I don't know how this graph is called, but I'm trying to achieve what is in the image (sorry for my poor drawing skills).
I am fairly familiar with gnuplot. If there is another plotting tool more appropriate for this, I can use that too. I have gnuplot code for a single plot of the image (e.g., S1), so if it is just a matter of telling gnuplot to plot several of those graphs side by side I can handle that, I just don't know how and didn't find any simple way of doing it.
Edit: I forgot to draw grid ytics Edit2: Making sure it is not a dulpicate