Create a svg instead

diff --git a/examples/step-39/doc/results.dox b/examples/step-39/doc/results.dox
index 250ca43f67216f51eef0e41c01293f6ac0b8db61..c9263a17c75e44915812c20223804eb7e84e5d0d 100644 (file)
--- a/examples/step-39/doc/results.dox
+++ b/examples/step-39/doc/results.dox
@@ -84,7 +84,7 @@ iteration steps is constant at approximately 15.
 
 <h2>Postprocessing of the logfile</h2>
 
-<img src="https://www.dealii.org/images/steps/developer/step-39-convergence.png" alt="">
+<img src="https://www.dealii.org/images/steps/developer/step-39-convergence.svg" alt="">
 Using the perl script <tt>postprocess.pl</tt>, we extract relevant
 data into <tt>output.dat</tt>, which can be used to plot graphs with
 <tt>gnuplot</tt>. The graph above for instance was produced using the gnuplot

diff --git a/examples/step-39/plot_errors.gpl b/examples/step-39/plot_errors.gpl
index 6305e3b7011f586d3078a926a57f77f65dbdccdf..a38f67164d04bb27467c32e7a005f01efe63ad39 100644 (file)
--- a/examples/step-39/plot_errors.gpl
+++ b/examples/step-39/plot_errors.gpl
@@ -4,8 +4,8 @@ set xrange [200:6000]
 set xtics (200,400,800,1600,3200)
 set xlabel "#dofs"
 set yrange [.004:2]
-set terminal png
-set output "step-39-convergence.png"
+set terminal svg
+set output "step-39-convergence.svg"
 plot "output.dat" using 2:3               title "error",    \
      ""           using 2:4               title "estimate", \
      ""           using 2:(5000*$2**-1.5) title "3rd order"