From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Mon, 29 Apr 2002 12:20:44 +0000 (+0000)
Subject: .
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ebec14e01780940a354e9862d7f574cf961bd22;p=dealii-svn.git

.


git-svn-id: https://svn.dealii.org/trunk@5740 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error-estimation.eps b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error-estimation.eps
new file mode 100644
index 0000000000..d7e3358c7e
--- /dev/null
+++ b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error-estimation.eps
@@ -0,0 +1,676 @@
+%!PS-Adobe-2.0 EPSF-2.0
+%%Title: x.eps
+%%Creator: gnuplot 3.7 patchlevel 1
+%%CreationDate: Mon Apr 29 09:33:11 2002
+%%DocumentFonts: (atend)
+%%BoundingBox: 50 50 266 201
+%%Orientation: Portrait
+%%EndComments
+/gnudict 256 dict def
+gnudict begin
+/Color true def
+/Solid false def
+/gnulinewidth 5.000 def
+/userlinewidth gnulinewidth def
+/vshift -46 def
+/dl {10 mul} def
+/hpt_ 31.5 def
+/vpt_ 31.5 def
+/hpt hpt_ def
+/vpt vpt_ def
+/M {moveto} bind def
+/L {lineto} bind def
+/R {rmoveto} bind def
+/V {rlineto} bind def
+/vpt2 vpt 2 mul def
+/hpt2 hpt 2 mul def
+/Lshow { currentpoint stroke M
+  0 vshift R show } def
+/Rshow { currentpoint stroke M
+  dup stringwidth pop neg vshift R show } def
+/Cshow { currentpoint stroke M
+  dup stringwidth pop -2 div vshift R show } def
+/UP { dup vpt_ mul /vpt exch def hpt_ mul /hpt exch def
+  /hpt2 hpt 2 mul def /vpt2 vpt 2 mul def } def
+/DL { Color {setrgbcolor Solid {pop []} if 0 setdash }
+ {pop pop pop Solid {pop []} if 0 setdash} ifelse } def
+/BL { stroke userlinewidth 2 mul setlinewidth } def
+/AL { stroke userlinewidth 2 div setlinewidth } def
+/UL { dup gnulinewidth mul /userlinewidth exch def
+      10 mul /udl exch def } def
+/PL { stroke userlinewidth setlinewidth } def
+/LTb { BL [] 0 0 0 DL } def
+/LTa { AL [1 udl mul 2 udl mul] 0 setdash 0 0 0 setrgbcolor } def
+/LT0 { PL [] 1 0 0 DL } def
+/LT1 { PL [4 dl 2 dl] 0 1 0 DL } def
+/LT2 { PL [2 dl 3 dl] 0 0 1 DL } def
+/LT3 { PL [1 dl 1.5 dl] 1 0 1 DL } def
+/LT4 { PL [5 dl 2 dl 1 dl 2 dl] 0 1 1 DL } def
+/LT5 { PL [4 dl 3 dl 1 dl 3 dl] 1 1 0 DL } def
+/LT6 { PL [2 dl 2 dl 2 dl 4 dl] 0 0 0 DL } def
+/LT7 { PL [2 dl 2 dl 2 dl 2 dl 2 dl 4 dl] 1 0.3 0 DL } def
+/LT8 { PL [2 dl 2 dl 2 dl 2 dl 2 dl 2 dl 2 dl 4 dl] 0.5 0.5 0.5 DL } def
+/Pnt { stroke [] 0 setdash
+   gsave 1 setlinecap M 0 0 V stroke grestore } def
+/Dia { stroke [] 0 setdash 2 copy vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V closepath stroke
+  Pnt } def
+/Pls { stroke [] 0 setdash vpt sub M 0 vpt2 V
+  currentpoint stroke M
+  hpt neg vpt neg R hpt2 0 V stroke
+  } def
+/Box { stroke [] 0 setdash 2 copy exch hpt sub exch vpt add M
+  0 vpt2 neg V hpt2 0 V 0 vpt2 V
+  hpt2 neg 0 V closepath stroke
+  Pnt } def
+/Crs { stroke [] 0 setdash exch hpt sub exch vpt add M
+  hpt2 vpt2 neg V currentpoint stroke M
+  hpt2 neg 0 R hpt2 vpt2 V stroke } def
+/TriU { stroke [] 0 setdash 2 copy vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V closepath stroke
+  Pnt  } def
+/Star { 2 copy Pls Crs } def
+/BoxF { stroke [] 0 setdash exch hpt sub exch vpt add M
+  0 vpt2 neg V  hpt2 0 V  0 vpt2 V
+  hpt2 neg 0 V  closepath fill } def
+/TriUF { stroke [] 0 setdash vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V closepath fill } def
+/TriD { stroke [] 0 setdash 2 copy vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V closepath stroke
+  Pnt  } def
+/TriDF { stroke [] 0 setdash vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V closepath fill} def
+/DiaF { stroke [] 0 setdash vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V closepath fill } def
+/Pent { stroke [] 0 setdash 2 copy gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  closepath stroke grestore Pnt } def
+/PentF { stroke [] 0 setdash gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  closepath fill grestore } def
+/Circle { stroke [] 0 setdash 2 copy
+  hpt 0 360 arc stroke Pnt } def
+/CircleF { stroke [] 0 setdash hpt 0 360 arc fill } def
+/C0 { BL [] 0 setdash 2 copy moveto vpt 90 450  arc } bind def
+/C1 { BL [] 0 setdash 2 copy        moveto
+       2 copy  vpt 0 90 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C2 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 90 180 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C3 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 0 180 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C4 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 180 270 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C5 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 0 90 arc
+       2 copy moveto
+       2 copy  vpt 180 270 arc closepath fill
+               vpt 0 360 arc } bind def
+/C6 { BL [] 0 setdash 2 copy moveto
+      2 copy  vpt 90 270 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C7 { BL [] 0 setdash 2 copy moveto
+      2 copy  vpt 0 270 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C8 { BL [] 0 setdash 2 copy moveto
+      2 copy vpt 270 360 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C9 { BL [] 0 setdash 2 copy moveto
+      2 copy  vpt 270 450 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C10 { BL [] 0 setdash 2 copy 2 copy moveto vpt 270 360 arc closepath fill
+       2 copy moveto
+       2 copy vpt 90 180 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C11 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 0 180 arc closepath fill
+       2 copy moveto
+       2 copy  vpt 270 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C12 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 180 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C13 { BL [] 0 setdash  2 copy moveto
+       2 copy  vpt 0 90 arc closepath fill
+       2 copy moveto
+       2 copy  vpt 180 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C14 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 90 360 arc closepath fill
+               vpt 0 360 arc } bind def
+/C15 { BL [] 0 setdash 2 copy vpt 0 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/Rec   { newpath 4 2 roll moveto 1 index 0 rlineto 0 exch rlineto
+       neg 0 rlineto closepath } bind def
+/Square { dup Rec } bind def
+/Bsquare { vpt sub exch vpt sub exch vpt2 Square } bind def
+/S0 { BL [] 0 setdash 2 copy moveto 0 vpt rlineto BL Bsquare } bind def
+/S1 { BL [] 0 setdash 2 copy vpt Square fill Bsquare } bind def
+/S2 { BL [] 0 setdash 2 copy exch vpt sub exch vpt Square fill Bsquare } bind def
+/S3 { BL [] 0 setdash 2 copy exch vpt sub exch vpt2 vpt Rec fill Bsquare } bind def
+/S4 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt Square fill Bsquare } bind def
+/S5 { BL [] 0 setdash 2 copy 2 copy vpt Square fill
+       exch vpt sub exch vpt sub vpt Square fill Bsquare } bind def
+/S6 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt vpt2 Rec fill Bsquare } bind def
+/S7 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt vpt2 Rec fill
+       2 copy vpt Square fill
+       Bsquare } bind def
+/S8 { BL [] 0 setdash 2 copy vpt sub vpt Square fill Bsquare } bind def
+/S9 { BL [] 0 setdash 2 copy vpt sub vpt vpt2 Rec fill Bsquare } bind def
+/S10 { BL [] 0 setdash 2 copy vpt sub vpt Square fill 2 copy exch vpt sub exch vpt Square fill
+       Bsquare } bind def
+/S11 { BL [] 0 setdash 2 copy vpt sub vpt Square fill 2 copy exch vpt sub exch vpt2 vpt Rec fill
+       Bsquare } bind def
+/S12 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill Bsquare } bind def
+/S13 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill
+       2 copy vpt Square fill Bsquare } bind def
+/S14 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill
+       2 copy exch vpt sub exch vpt Square fill Bsquare } bind def
+/S15 { BL [] 0 setdash 2 copy Bsquare fill Bsquare } bind def
+/D0 { gsave translate 45 rotate 0 0 S0 stroke grestore } bind def
+/D1 { gsave translate 45 rotate 0 0 S1 stroke grestore } bind def
+/D2 { gsave translate 45 rotate 0 0 S2 stroke grestore } bind def
+/D3 { gsave translate 45 rotate 0 0 S3 stroke grestore } bind def
+/D4 { gsave translate 45 rotate 0 0 S4 stroke grestore } bind def
+/D5 { gsave translate 45 rotate 0 0 S5 stroke grestore } bind def
+/D6 { gsave translate 45 rotate 0 0 S6 stroke grestore } bind def
+/D7 { gsave translate 45 rotate 0 0 S7 stroke grestore } bind def
+/D8 { gsave translate 45 rotate 0 0 S8 stroke grestore } bind def
+/D9 { gsave translate 45 rotate 0 0 S9 stroke grestore } bind def
+/D10 { gsave translate 45 rotate 0 0 S10 stroke grestore } bind def
+/D11 { gsave translate 45 rotate 0 0 S11 stroke grestore } bind def
+/D12 { gsave translate 45 rotate 0 0 S12 stroke grestore } bind def
+/D13 { gsave translate 45 rotate 0 0 S13 stroke grestore } bind def
+/D14 { gsave translate 45 rotate 0 0 S14 stroke grestore } bind def
+/D15 { gsave translate 45 rotate 0 0 S15 stroke grestore } bind def
+/DiaE { stroke [] 0 setdash vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V closepath stroke } def
+/BoxE { stroke [] 0 setdash exch hpt sub exch vpt add M
+  0 vpt2 neg V hpt2 0 V 0 vpt2 V
+  hpt2 neg 0 V closepath stroke } def
+/TriUE { stroke [] 0 setdash vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V closepath stroke } def
+/TriDE { stroke [] 0 setdash vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V closepath stroke } def
+/PentE { stroke [] 0 setdash gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  closepath stroke grestore } def
+/CircE { stroke [] 0 setdash 
+  hpt 0 360 arc stroke } def
+/Opaque { gsave closepath 1 setgray fill grestore 0 setgray closepath } def
+/DiaW { stroke [] 0 setdash vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V Opaque stroke } def
+/BoxW { stroke [] 0 setdash exch hpt sub exch vpt add M
+  0 vpt2 neg V hpt2 0 V 0 vpt2 V
+  hpt2 neg 0 V Opaque stroke } def
+/TriUW { stroke [] 0 setdash vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V Opaque stroke } def
+/TriDW { stroke [] 0 setdash vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V Opaque stroke } def
+/PentW { stroke [] 0 setdash gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  Opaque stroke grestore } def
+/CircW { stroke [] 0 setdash 
+  hpt 0 360 arc Opaque stroke } def
+/BoxFill { gsave Rec 1 setgray fill grestore } def
+/Symbol-Oblique /Symbol findfont [1 0 .167 1 0 0] makefont
+dup length dict begin {1 index /FID eq {pop pop} {def} ifelse} forall
+currentdict end definefont
+/MFshow {{dup dup 0 get findfont exch 1 get scalefont setfont
+     [ currentpoint ] exch dup 2 get 0 exch rmoveto dup dup 5 get exch 4 get
+     {show} {stringwidth pop 0 rmoveto}ifelse dup 3 get
+     {2 get neg 0 exch rmoveto pop} {pop aload pop moveto}ifelse} forall} bind def
+/MFwidth {0 exch {dup 3 get{dup dup 0 get findfont exch 1 get scalefont setfont
+      5 get stringwidth pop add}
+    {pop} ifelse} forall} bind def
+/MLshow { currentpoint stroke M
+  0 exch R MFshow } bind def
+/MRshow { currentpoint stroke M
+  exch dup MFwidth neg 3 -1 roll R MFshow } def
+/MCshow { currentpoint stroke M
+  exch dup MFwidth -2 div 3 -1 roll R MFshow } def
+end
+%%EndProlog
+gnudict begin
+gsave
+50 50 translate
+0.050 0.050 scale
+0 setgray
+newpath
+(Helvetica) findfont 140 scalefont setfont
+1.000 UL
+LTb
+882 420 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 420 M
+[ [(Helvetica) 140.0 0.0 true true (1e-06)]
+] -46.7 MRshow
+882 584 M
+31 0 V
+3169 0 R
+-31 0 V
+882 681 M
+31 0 V
+3169 0 R
+-31 0 V
+882 749 M
+31 0 V
+3169 0 R
+-31 0 V
+882 802 M
+31 0 V
+3169 0 R
+-31 0 V
+882 845 M
+31 0 V
+3169 0 R
+-31 0 V
+882 881 M
+31 0 V
+3169 0 R
+-31 0 V
+882 913 M
+31 0 V
+3169 0 R
+-31 0 V
+882 941 M
+31 0 V
+3169 0 R
+-31 0 V
+882 966 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 966 M
+[ [(Helvetica) 140.0 0.0 true true (1e-05)]
+] -46.7 MRshow
+882 1130 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1227 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1295 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1348 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1391 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1427 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1459 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1487 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1512 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 1512 M
+[ [(Helvetica) 140.0 0.0 true true (0.0001)]
+] -46.7 MRshow
+882 1676 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1773 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1841 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1894 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1937 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1973 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2005 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2033 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2058 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 2058 M
+[ [(Helvetica) 140.0 0.0 true true (0.001)]
+] -46.7 MRshow
+882 2222 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2319 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2387 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2440 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2483 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2519 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2551 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2579 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2604 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 2604 M
+[ [(Helvetica) 140.0 0.0 true true (0.01)]
+] -46.7 MRshow
+882 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+882 280 M
+[ [(Helvetica) 140.0 0.0 true true (10)]
+] -46.7 MCshow
+1123 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1264 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1364 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1441 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1505 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1558 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1604 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1645 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1682 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+1682 280 M
+[ [(Helvetica) 140.0 0.0 true true (100)]
+] -46.7 MCshow
+1923 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2064 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2164 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2241 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2305 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2358 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2404 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2445 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2482 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+2482 280 M
+[ [(Helvetica) 140.0 0.0 true true (1000)]
+] -46.7 MCshow
+2723 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2864 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2964 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3041 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3105 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3158 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3204 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3245 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3282 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+3282 280 M
+[ [(Helvetica) 140.0 0.0 true true (10000)]
+] -46.7 MCshow
+3523 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3664 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3764 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3841 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3905 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3958 420 M
+0 31 V
+0 2153 R
+0 -31 V
+4004 420 M
+0 31 V
+0 2153 R
+0 -31 V
+4045 420 M
+0 31 V
+0 2153 R
+0 -31 V
+4082 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+4082 280 M
+[ [(Helvetica) 140.0 0.0 true true (100000)]
+] -46.7 MCshow
+1.000 UL
+LTb
+882 420 M
+3200 0 V
+0 2184 V
+-3200 0 V
+882 420 L
+ stroke
+140 1512 M
+currentpoint gsave translate 90 rotate 0 0 moveto
+[ [(Helvetica) 140.0 0.0 true true (Error)]
+] -46.7 MCshow
+grestore
+2482 70 M
+[ [(Helvetica) 140.0 0.0 true true (Number of degrees of freedom)]
+] -46.7 MCshow
+2482 2814 M
+[ [(Helvetica) 140.0 0.0 true true (Errors)]
+] -46.7 MCshow
+1.000 UP
+1.000 UL
+LT0
+3431 2471 M
+[ [(Helvetica) 140.0 0.0 true true (Error in computed value)]
+] -46.7 MRshow
+3515 2471 M
+399 0 V
+1568 2062 M
+-25 -13 V
+230 -162 V
+299 -154 V
+295 -275 V
+298 -182 V
+304 -202 V
+3250 867 L
+3561 664 L
+1568 2062 Pls
+1543 2049 Pls
+1773 1887 Pls
+2072 1733 Pls
+2367 1458 Pls
+2665 1276 Pls
+2969 1074 Pls
+3250 867 Pls
+3561 664 Pls
+3714 2471 Pls
+1.000 UP
+1.000 UL
+LT1
+3431 2331 M
+[ [(Helvetica) 140.0 0.0 true true (Estimated error)]
+] -46.7 MRshow
+3515 2331 M
+399 0 V
+1568 1974 M
+-25 56 V
+230 -159 V
+299 -150 V
+295 -277 V
+298 -182 V
+304 -201 V
+3250 854 L
+1568 1974 Crs
+1543 2030 Crs
+1773 1871 Crs
+2072 1721 Crs
+2367 1444 Crs
+2665 1262 Crs
+2969 1061 Crs
+3250 854 Crs
+3714 2331 Crs
+stroke
+grestore
+end
+showpage
diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error-estimation.gif b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error-estimation.gif
new file mode 100644
index 0000000000..8e0c389a93
Binary files /dev/null and b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error-estimation.gif differ
diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error.eps b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error.eps
new file mode 100644
index 0000000000..a2e5cd4d4a
--- /dev/null
+++ b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error.eps
@@ -0,0 +1,723 @@
+%!PS-Adobe-2.0 EPSF-2.0
+%%Title: x.eps
+%%Creator: gnuplot 3.7 patchlevel 1
+%%CreationDate: Mon Apr 29 09:24:19 2002
+%%DocumentFonts: (atend)
+%%BoundingBox: 50 50 266 201
+%%Orientation: Portrait
+%%EndComments
+/gnudict 256 dict def
+gnudict begin
+/Color true def
+/Solid false def
+/gnulinewidth 5.000 def
+/userlinewidth gnulinewidth def
+/vshift -46 def
+/dl {10 mul} def
+/hpt_ 31.5 def
+/vpt_ 31.5 def
+/hpt hpt_ def
+/vpt vpt_ def
+/M {moveto} bind def
+/L {lineto} bind def
+/R {rmoveto} bind def
+/V {rlineto} bind def
+/vpt2 vpt 2 mul def
+/hpt2 hpt 2 mul def
+/Lshow { currentpoint stroke M
+  0 vshift R show } def
+/Rshow { currentpoint stroke M
+  dup stringwidth pop neg vshift R show } def
+/Cshow { currentpoint stroke M
+  dup stringwidth pop -2 div vshift R show } def
+/UP { dup vpt_ mul /vpt exch def hpt_ mul /hpt exch def
+  /hpt2 hpt 2 mul def /vpt2 vpt 2 mul def } def
+/DL { Color {setrgbcolor Solid {pop []} if 0 setdash }
+ {pop pop pop Solid {pop []} if 0 setdash} ifelse } def
+/BL { stroke userlinewidth 2 mul setlinewidth } def
+/AL { stroke userlinewidth 2 div setlinewidth } def
+/UL { dup gnulinewidth mul /userlinewidth exch def
+      10 mul /udl exch def } def
+/PL { stroke userlinewidth setlinewidth } def
+/LTb { BL [] 0 0 0 DL } def
+/LTa { AL [1 udl mul 2 udl mul] 0 setdash 0 0 0 setrgbcolor } def
+/LT0 { PL [] 1 0 0 DL } def
+/LT1 { PL [4 dl 2 dl] 0 1 0 DL } def
+/LT2 { PL [2 dl 3 dl] 0 0 1 DL } def
+/LT3 { PL [1 dl 1.5 dl] 1 0 1 DL } def
+/LT4 { PL [5 dl 2 dl 1 dl 2 dl] 0 1 1 DL } def
+/LT5 { PL [4 dl 3 dl 1 dl 3 dl] 1 1 0 DL } def
+/LT6 { PL [2 dl 2 dl 2 dl 4 dl] 0 0 0 DL } def
+/LT7 { PL [2 dl 2 dl 2 dl 2 dl 2 dl 4 dl] 1 0.3 0 DL } def
+/LT8 { PL [2 dl 2 dl 2 dl 2 dl 2 dl 2 dl 2 dl 4 dl] 0.5 0.5 0.5 DL } def
+/Pnt { stroke [] 0 setdash
+   gsave 1 setlinecap M 0 0 V stroke grestore } def
+/Dia { stroke [] 0 setdash 2 copy vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V closepath stroke
+  Pnt } def
+/Pls { stroke [] 0 setdash vpt sub M 0 vpt2 V
+  currentpoint stroke M
+  hpt neg vpt neg R hpt2 0 V stroke
+  } def
+/Box { stroke [] 0 setdash 2 copy exch hpt sub exch vpt add M
+  0 vpt2 neg V hpt2 0 V 0 vpt2 V
+  hpt2 neg 0 V closepath stroke
+  Pnt } def
+/Crs { stroke [] 0 setdash exch hpt sub exch vpt add M
+  hpt2 vpt2 neg V currentpoint stroke M
+  hpt2 neg 0 R hpt2 vpt2 V stroke } def
+/TriU { stroke [] 0 setdash 2 copy vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V closepath stroke
+  Pnt  } def
+/Star { 2 copy Pls Crs } def
+/BoxF { stroke [] 0 setdash exch hpt sub exch vpt add M
+  0 vpt2 neg V  hpt2 0 V  0 vpt2 V
+  hpt2 neg 0 V  closepath fill } def
+/TriUF { stroke [] 0 setdash vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V closepath fill } def
+/TriD { stroke [] 0 setdash 2 copy vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V closepath stroke
+  Pnt  } def
+/TriDF { stroke [] 0 setdash vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V closepath fill} def
+/DiaF { stroke [] 0 setdash vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V closepath fill } def
+/Pent { stroke [] 0 setdash 2 copy gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  closepath stroke grestore Pnt } def
+/PentF { stroke [] 0 setdash gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  closepath fill grestore } def
+/Circle { stroke [] 0 setdash 2 copy
+  hpt 0 360 arc stroke Pnt } def
+/CircleF { stroke [] 0 setdash hpt 0 360 arc fill } def
+/C0 { BL [] 0 setdash 2 copy moveto vpt 90 450  arc } bind def
+/C1 { BL [] 0 setdash 2 copy        moveto
+       2 copy  vpt 0 90 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C2 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 90 180 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C3 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 0 180 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C4 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 180 270 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C5 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 0 90 arc
+       2 copy moveto
+       2 copy  vpt 180 270 arc closepath fill
+               vpt 0 360 arc } bind def
+/C6 { BL [] 0 setdash 2 copy moveto
+      2 copy  vpt 90 270 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C7 { BL [] 0 setdash 2 copy moveto
+      2 copy  vpt 0 270 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C8 { BL [] 0 setdash 2 copy moveto
+      2 copy vpt 270 360 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C9 { BL [] 0 setdash 2 copy moveto
+      2 copy  vpt 270 450 arc closepath fill
+              vpt 0 360 arc closepath } bind def
+/C10 { BL [] 0 setdash 2 copy 2 copy moveto vpt 270 360 arc closepath fill
+       2 copy moveto
+       2 copy vpt 90 180 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C11 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 0 180 arc closepath fill
+       2 copy moveto
+       2 copy  vpt 270 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C12 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 180 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C13 { BL [] 0 setdash  2 copy moveto
+       2 copy  vpt 0 90 arc closepath fill
+       2 copy moveto
+       2 copy  vpt 180 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/C14 { BL [] 0 setdash 2 copy moveto
+       2 copy  vpt 90 360 arc closepath fill
+               vpt 0 360 arc } bind def
+/C15 { BL [] 0 setdash 2 copy vpt 0 360 arc closepath fill
+               vpt 0 360 arc closepath } bind def
+/Rec   { newpath 4 2 roll moveto 1 index 0 rlineto 0 exch rlineto
+       neg 0 rlineto closepath } bind def
+/Square { dup Rec } bind def
+/Bsquare { vpt sub exch vpt sub exch vpt2 Square } bind def
+/S0 { BL [] 0 setdash 2 copy moveto 0 vpt rlineto BL Bsquare } bind def
+/S1 { BL [] 0 setdash 2 copy vpt Square fill Bsquare } bind def
+/S2 { BL [] 0 setdash 2 copy exch vpt sub exch vpt Square fill Bsquare } bind def
+/S3 { BL [] 0 setdash 2 copy exch vpt sub exch vpt2 vpt Rec fill Bsquare } bind def
+/S4 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt Square fill Bsquare } bind def
+/S5 { BL [] 0 setdash 2 copy 2 copy vpt Square fill
+       exch vpt sub exch vpt sub vpt Square fill Bsquare } bind def
+/S6 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt vpt2 Rec fill Bsquare } bind def
+/S7 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt vpt2 Rec fill
+       2 copy vpt Square fill
+       Bsquare } bind def
+/S8 { BL [] 0 setdash 2 copy vpt sub vpt Square fill Bsquare } bind def
+/S9 { BL [] 0 setdash 2 copy vpt sub vpt vpt2 Rec fill Bsquare } bind def
+/S10 { BL [] 0 setdash 2 copy vpt sub vpt Square fill 2 copy exch vpt sub exch vpt Square fill
+       Bsquare } bind def
+/S11 { BL [] 0 setdash 2 copy vpt sub vpt Square fill 2 copy exch vpt sub exch vpt2 vpt Rec fill
+       Bsquare } bind def
+/S12 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill Bsquare } bind def
+/S13 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill
+       2 copy vpt Square fill Bsquare } bind def
+/S14 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill
+       2 copy exch vpt sub exch vpt Square fill Bsquare } bind def
+/S15 { BL [] 0 setdash 2 copy Bsquare fill Bsquare } bind def
+/D0 { gsave translate 45 rotate 0 0 S0 stroke grestore } bind def
+/D1 { gsave translate 45 rotate 0 0 S1 stroke grestore } bind def
+/D2 { gsave translate 45 rotate 0 0 S2 stroke grestore } bind def
+/D3 { gsave translate 45 rotate 0 0 S3 stroke grestore } bind def
+/D4 { gsave translate 45 rotate 0 0 S4 stroke grestore } bind def
+/D5 { gsave translate 45 rotate 0 0 S5 stroke grestore } bind def
+/D6 { gsave translate 45 rotate 0 0 S6 stroke grestore } bind def
+/D7 { gsave translate 45 rotate 0 0 S7 stroke grestore } bind def
+/D8 { gsave translate 45 rotate 0 0 S8 stroke grestore } bind def
+/D9 { gsave translate 45 rotate 0 0 S9 stroke grestore } bind def
+/D10 { gsave translate 45 rotate 0 0 S10 stroke grestore } bind def
+/D11 { gsave translate 45 rotate 0 0 S11 stroke grestore } bind def
+/D12 { gsave translate 45 rotate 0 0 S12 stroke grestore } bind def
+/D13 { gsave translate 45 rotate 0 0 S13 stroke grestore } bind def
+/D14 { gsave translate 45 rotate 0 0 S14 stroke grestore } bind def
+/D15 { gsave translate 45 rotate 0 0 S15 stroke grestore } bind def
+/DiaE { stroke [] 0 setdash vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V closepath stroke } def
+/BoxE { stroke [] 0 setdash exch hpt sub exch vpt add M
+  0 vpt2 neg V hpt2 0 V 0 vpt2 V
+  hpt2 neg 0 V closepath stroke } def
+/TriUE { stroke [] 0 setdash vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V closepath stroke } def
+/TriDE { stroke [] 0 setdash vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V closepath stroke } def
+/PentE { stroke [] 0 setdash gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  closepath stroke grestore } def
+/CircE { stroke [] 0 setdash 
+  hpt 0 360 arc stroke } def
+/Opaque { gsave closepath 1 setgray fill grestore 0 setgray closepath } def
+/DiaW { stroke [] 0 setdash vpt add M
+  hpt neg vpt neg V hpt vpt neg V
+  hpt vpt V hpt neg vpt V Opaque stroke } def
+/BoxW { stroke [] 0 setdash exch hpt sub exch vpt add M
+  0 vpt2 neg V hpt2 0 V 0 vpt2 V
+  hpt2 neg 0 V Opaque stroke } def
+/TriUW { stroke [] 0 setdash vpt 1.12 mul add M
+  hpt neg vpt -1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt 1.62 mul V Opaque stroke } def
+/TriDW { stroke [] 0 setdash vpt 1.12 mul sub M
+  hpt neg vpt 1.62 mul V
+  hpt 2 mul 0 V
+  hpt neg vpt -1.62 mul V Opaque stroke } def
+/PentW { stroke [] 0 setdash gsave
+  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat
+  Opaque stroke grestore } def
+/CircW { stroke [] 0 setdash 
+  hpt 0 360 arc Opaque stroke } def
+/BoxFill { gsave Rec 1 setgray fill grestore } def
+/Symbol-Oblique /Symbol findfont [1 0 .167 1 0 0] makefont
+dup length dict begin {1 index /FID eq {pop pop} {def} ifelse} forall
+currentdict end definefont
+/MFshow {{dup dup 0 get findfont exch 1 get scalefont setfont
+     [ currentpoint ] exch dup 2 get 0 exch rmoveto dup dup 5 get exch 4 get
+     {show} {stringwidth pop 0 rmoveto}ifelse dup 3 get
+     {2 get neg 0 exch rmoveto pop} {pop aload pop moveto}ifelse} forall} bind def
+/MFwidth {0 exch {dup 3 get{dup dup 0 get findfont exch 1 get scalefont setfont
+      5 get stringwidth pop add}
+    {pop} ifelse} forall} bind def
+/MLshow { currentpoint stroke M
+  0 exch R MFshow } bind def
+/MRshow { currentpoint stroke M
+  exch dup MFwidth neg 3 -1 roll R MFshow } def
+/MCshow { currentpoint stroke M
+  exch dup MFwidth -2 div 3 -1 roll R MFshow } def
+end
+%%EndProlog
+gnudict begin
+gsave
+50 50 translate
+0.050 0.050 scale
+0 setgray
+newpath
+(Helvetica) findfont 140 scalefont setfont
+1.000 UL
+LTb
+882 420 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 420 M
+[ [(Helvetica) 140.0 0.0 true true (1e-07)]
+] -46.7 MRshow
+882 551 M
+31 0 V
+3169 0 R
+-31 0 V
+882 725 M
+31 0 V
+3169 0 R
+-31 0 V
+882 814 M
+31 0 V
+3169 0 R
+-31 0 V
+882 857 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 857 M
+[ [(Helvetica) 140.0 0.0 true true (1e-06)]
+] -46.7 MRshow
+882 988 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1162 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1251 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1294 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 1294 M
+[ [(Helvetica) 140.0 0.0 true true (1e-05)]
+] -46.7 MRshow
+882 1425 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1599 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1688 M
+31 0 V
+3169 0 R
+-31 0 V
+882 1730 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 1730 M
+[ [(Helvetica) 140.0 0.0 true true (0.0001)]
+] -46.7 MRshow
+882 1862 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2036 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2125 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2167 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 2167 M
+[ [(Helvetica) 140.0 0.0 true true (0.001)]
+] -46.7 MRshow
+882 2299 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2473 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2562 M
+31 0 V
+3169 0 R
+-31 0 V
+882 2604 M
+63 0 V
+3137 0 R
+-63 0 V
+ stroke
+798 2604 M
+[ [(Helvetica) 140.0 0.0 true true (0.01)]
+] -46.7 MRshow
+882 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+882 280 M
+[ [(Helvetica) 140.0 0.0 true true (10)]
+] -46.7 MCshow
+1123 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1264 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1364 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1441 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1505 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1558 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1604 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1645 420 M
+0 31 V
+0 2153 R
+0 -31 V
+1682 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+1682 280 M
+[ [(Helvetica) 140.0 0.0 true true (100)]
+] -46.7 MCshow
+1923 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2064 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2164 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2241 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2305 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2358 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2404 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2445 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2482 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+2482 280 M
+[ [(Helvetica) 140.0 0.0 true true (1000)]
+] -46.7 MCshow
+2723 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2864 420 M
+0 31 V
+0 2153 R
+0 -31 V
+2964 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3041 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3105 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3158 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3204 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3245 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3282 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+3282 280 M
+[ [(Helvetica) 140.0 0.0 true true (10000)]
+] -46.7 MCshow
+3523 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3664 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3764 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3841 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3905 420 M
+0 31 V
+0 2153 R
+0 -31 V
+3958 420 M
+0 31 V
+0 2153 R
+0 -31 V
+4004 420 M
+0 31 V
+0 2153 R
+0 -31 V
+4045 420 M
+0 31 V
+0 2153 R
+0 -31 V
+4082 420 M
+0 63 V
+0 2121 R
+0 -63 V
+ stroke
+4082 280 M
+[ [(Helvetica) 140.0 0.0 true true (100000)]
+] -46.7 MCshow
+1.000 UL
+LTb
+882 420 M
+3200 0 V
+0 2184 V
+-3200 0 V
+882 420 L
+ stroke
+140 1512 M
+currentpoint gsave translate 90 rotate 0 0 moveto
+[ [(Helvetica) 140.0 0.0 true true (Error)]
+] -46.7 MCshow
+grestore
+2482 70 M
+[ [(Helvetica) 140.0 0.0 true true (Number of degrees of freedom)]
+] -46.7 MCshow
+2482 2814 M
+[ [(Helvetica) 140.0 0.0 true true (Errors)]
+] -46.7 MCshow
+1.000 UP
+1.000 UL
+LT0
+3431 2471 M
+[ [(Helvetica) 140.0 0.0 true true (Error in computed value)]
+] -46.7 MRshow
+3515 2471 M
+399 0 V
+1568 2170 M
+-25 -10 V
+230 -130 V
+299 -123 V
+295 -219 V
+298 -147 V
+304 -161 V
+281 -165 V
+311 -163 V
+1568 2170 Pls
+1543 2160 Pls
+1773 2030 Pls
+2072 1907 Pls
+2367 1688 Pls
+2665 1541 Pls
+2969 1380 Pls
+3250 1215 Pls
+3561 1052 Pls
+3714 2471 Pls
+1.000 UP
+1.000 UL
+LT1
+3431 2331 M
+[ [(Helvetica) 140.0 0.0 true true (Error in computed value+estimated error)]
+] -46.7 MRshow
+3515 2331 M
+399 0 V
+1568 1948 M
+-25 -271 V
+230 -170 V
+299 -169 V
+295 -180 V
+2665 998 L
+2969 827 L
+3250 665 L
+1568 1948 Crs
+1543 1677 Crs
+1773 1507 Crs
+2072 1338 Crs
+2367 1158 Crs
+2665 998 Crs
+2969 827 Crs
+3250 665 Crs
+3714 2331 Crs
+1.000 UL
+LT2
+3431 2191 M
+[ [(Helvetica) 140.0 0.0 true true (O\(1/N\))]
+] -46.7 MRshow
+3515 2191 M
+399 0 V
+1543 1980 M
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -12 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -12 V
+20 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+21 -11 V
+20 -11 V
+20 -11 V
+21 -12 V
+stroke
+grestore
+end
+showpage
diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error.gif b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error.gif
new file mode 100644
index 0000000000..d4c0249fe4
Binary files /dev/null and b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/point_value/error.gif differ
diff --git a/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/results.html b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/results.html
index e67fccc1c1..0dcc79e522 100644
--- a/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/results.html
+++ b/deal.II/doc/tutorial/chapter-2.step-by-step/step-14.data/results.html
@@ -1,2 +1,215 @@
 <a name="Results"></a>
 <h1>Results</h1>
+
+<h2>Point values</h2>
+
+<p>
+This program offers a lot of possibilities to play around. We can thus
+only show a small part of all possible results that can be obtained
+with the help of this program. However, you are encouraged to just try
+it out, by changing the settings in the main program. Here, we start
+by simple letting it run, unmodified:
+<code>
+<pre>
+Refinement cycle: 0
+   Number of degrees of freedom=72
+   Point value=0.03243
+   Estimated error=0.000702385
+Refinement cycle: 1
+   Number of degrees of freedom=67
+   Point value=0.0324827
+   Estimated error=0.000888953
+Refinement cycle: 2
+   Number of degrees of freedom=130
+   Point value=0.0329619
+   Estimated error=0.000454606
+Refinement cycle: 3
+   Number of degrees of freedom=307
+   Point value=0.0331934
+   Estimated error=0.000241254
+Refinement cycle: 4
+   Number of degrees of freedom=718
+   Point value=0.0333675
+   Estimated error=7.4912e-05
+Refinement cycle: 5
+   Number of degrees of freedom=1691
+   Point value=0.0334104
+   Estimated error=3.47976e-05
+Refinement cycle: 6
+   Number of degrees of freedom=4065
+   Point value=0.0334315
+   Estimated error=1.49476e-05
+Refinement cycle: 7
+   Number of degrees of freedom=9113
+   Point value=0.0334407
+   Estimated error=6.23712e-06
+Refinement cycle: 8
+   Number of degrees of freedom=22303
+   Point value=0.0334445
+</pre>
+</code>
+</p>
+
+<p>
+First let's look what the program actually computed, by looking at
+some of the grids and solutions that were printed:
+TODO
+
+Note the subtle interplay between resolving the corner singularities,
+and resolving around the point of evaluation. It will be rather
+difficult to generate such a mesh by hand, as this would involve to
+judge quantitatively how much which of the four corner singularities
+shall be resolved, and to set the weight compared to the vicinity of
+the evaluation point.
+</p>
+
+<p>
+The program prints the point value and the estimated error in this
+quantity. From extrapolating it, we can guess that the exact value is
+somewhat like 0.0334473, plus or minus 0.0000001 (note that we get
+almost 6 valid digits from only 22,000 (primal) degrees of
+freedom. This number cannot be obtaint from the value of the
+functional alone, but I have used the assumption that the error
+estimator is mostly exact, and extrapolated the computed value plus
+the estimated error, to get an approximation of the true
+value. Computing with more degrees of freedom shows that this
+assumption is indeed valid.
+</p>
+
+<p>
+From the computed results, we can generate two graphs: one that shows
+the convergence of the error J(u)-J(u<sub>h</sub>) (taking the
+extrapolated value as correct) in the point value, and the value that
+we get by adding up computed value J(u<sub>h</sub>) and estimated
+error eta (if the error estimator eta were exact, then the value
+J(u<sub>h</sub>)+eta would equal the exact point value, and the error
+in this quantity would always be zero; however, since the error
+estimator is only a - good - approximation to the true error, we can
+by this only reduce the size of the error). In this graph, we also
+indicate the complexity <em>O(1/N)</em> to show that mesh refinement
+acts optimal in this case. The second chart compares
+true and estimated error, and shows that the two are actually very
+close to each other, even for such a complicated quantity as the point
+value:
+</p>
+
+<table align="center">
+  <tr>
+    <td width="50%">
+      <a href="step-14.data/point_value/error.gif" target="_top">
+      <img alt="Error in point value" width="318"
+      src="step-14.data/point_value/error.gif">
+      </img></a>
+    </td>
+
+    <td width="50%">
+      <a href="step-14.data/point_value/error-estimation.gif" target="_top">
+      <img alt="Error in point value" width="318"
+      src="step-14.data/point_value/error-estimation.gif">
+      </img></a>
+    </td>
+  </tr>
+</table>
+
+
+<h2>Comparing refinement criteria</h2>
+
+<p>
+Since we have accepted quite some effort when using the mesh
+refinement driven by the dual weighted error estimator (for solving
+the dual problem, and for evaluating the error representation), it is
+worth while asking whether that effort was successful. To this end, we
+first compare the achieved error levels for different mesh refinement
+criteria. To generate this data, simply change the value of the mesh
+refinement criterion variable in the main program. The results are thus:
+TODO
+</p>
+
+
+<h2>Evaluation of point stresses</h2>
+
+<p>
+Besides evaluating the values of the solution at a certain point, the
+program also offers the possibility to evaluate the x-derivatives at a
+certain point, and also to tailor mesh refinement for this. To let the
+program compute these quantities, simply replace the two occurences of
+<code>PointValueEvaluation</code> in the main function by
+<code>PointXDerivativeEvaluation</code>, and let the program run:
+<code>
+<pre>
+Refinement cycle: 0
+   Number of degrees of freedom=72
+   Point x-derivative=-0.287759
+   Estimated error=-0.0126173
+Refinement cycle: 1
+   Number of degrees of freedom=61
+   Point x-derivative=-0.283182
+   Estimated error=-0.00774316
+Refinement cycle: 2
+   Number of degrees of freedom=131
+   Point x-derivative=-0.227468
+   Estimated error=-0.00313426
+Refinement cycle: 3
+   Number of degrees of freedom=247
+   Point x-derivative=-0.212132
+   Estimated error=-0.00136114
+Refinement cycle: 4
+   Number of degrees of freedom=541
+   Point x-derivative=-0.210584
+   Estimated error=-0.000555479
+Refinement cycle: 5
+   Number of degrees of freedom=1286
+   Point x-derivative=-0.210758
+   Estimated error=-0.0002261
+Refinement cycle: 6
+   Number of degrees of freedom=2924
+   Point x-derivative=-0.211001
+   Estimated error=-9.38035e-05
+Refinement cycle: 7
+   Number of degrees of freedom=6578
+   Point x-derivative=-0.211151
+   Estimated error=-3.94139e-05
+Refinement cycle: 8
+   Number of degrees of freedom=14780
+   Point x-derivative=-0.211219
+   Estimated error=-1.85456e-05
+Refinement cycle: 9
+   Number of degrees of freedom=31438
+   Point x-derivative=-0.211258
+</p>
+
+<p>
+We again look at the meshes first:
+TODO
+</p>
+
+<p>
+Then, it is interesting to compare actually computed values of the
+quantity of interest (i.e. the x-derivative of the solution at one
+point) with those values which we get from computing
+on finer meshes.
+TODO
+</p>
+
+
+
+<h2>Step-13 revisited</h2>
+
+<p>
+If instead of the <code>Exercise_2_3</code> data set, we choose
+<code>CurvedRidges</code> in the main function, we can redo the
+computations of the previous example program, to compare whether the
+results obtained with the help of the dual weighted error estimator
+are better than those we had previously.
+TODO
+</p>
+
+
+<h2>Outlook</h2>
+
+<p>
+As stated, the program is quite modular, and implementing another test
+case, or another evaluation and dual functional is simple. You are
+encouraged to take the program as a basis for your own experiments,
+and to play a little.
+</p>
\ No newline at end of file