it would be interesting to be able to plot a 2D graph within an Ada code rather than having to save values say to file and use an external drawing software afterwards. A search
PLplot is a cross-platform package for creating scientific plots. It has a well-documented Ada binding. For reference, this gallery illustrates a variety of plots. Click a thumbnail to view a full-size image. Click either Ada tab (standard or traditional) to see the corresponding source code.