README.pod contains graphical images for the website

extract_README.sh

@@ -10,5 +10,28 @@ L<"slides"|https://github.com/dkogan/talk-feedgnuplot-vnlog/blob/master/feedgnup
 
 EOF
 
+seq 5 | awk '{print 2*$1, $1*$1}' |
+   feedgnuplot               \
+     --lines                 \
+     --points                \
+     --title "Test plot"     \
+     --y2 1                  \
+     --unset key             \
+     --unset grid            \
+     --hardcopy 'documentation-header-plot.svg'
+
+
+< bin/feedgnuplot                                                          \
+  awk '/^ *Test plot$/,/^ *1 +1.5 +2 +2.5/                                 \
+       { if(!wrote_plot1) { print "=for html <p><img src=\"documentation-header-plot.svg\">"; \
+                            wrote_plot1 = 1; }                             \
+         next;                                                             \
+       }                                                                   \
+       /^ *wlan0 throughput$/,/seconds/                                    \
+       { if(!wrote_plot2) { print "=for html <p><img src=\"documentation-header-network-throughput-plot.svg\">"; \
+                            wrote_plot2 = 1; }                             \
+         next;                                                             \
+       }                                                                   \
+       /=head1/,0                                                          \
+       { print }' >> README.pod
 
-< bin/feedgnuplot awk '/=head1/,0' >> README.pod