No way of knowing without seeing the code used to create the plots. However, the images appear to be using the default colors, so if you know what order the signals were plotted, you can figure out what each color represetns. Still, it sounds like it would be a good idea to add a legend to your plots. There are 7 colors used in MATLAB by default to distinguish unique series. These can be determined using colororder
C = colororder
C =
0 0.4470 0.7410
0.8500 0.3250 0.0980
0.9290 0.6940 0.1250
0.4940 0.1840 0.5560
0.4660 0.6740 0.1880
0.3010 0.7450 0.9330
0.6350 0.0780 0.1840
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
I'll use imagesc to show what the colors are in order (1 is first, 7 is last).
imagesc(reshape(C,7,1,3))
So if FP1 were plotted first, it would be dark blue. If FP2 were plotted second, it would be orange. Continuing on, then O1 woud be red, and since O2 is the 8th line added to your plot, the colororder would start over, and it would also be dark blue.
