Add examples of figures in the Plotting section

[e-zaline]

Hi, I believe it would be nice to have ready-made charts in the plotting sections. It would allow to have a quick and direct look at the results, and to have some examples of charts to show the user how to use it (the various categories make the plotting section very flexible but also harder to understand it for beginner users). Is it planned? Best regards

[soininen]

Ready-made 'default' charts are planned so it is good to have this issue to remind us about it :)