Matlab solves differential equations but returns empty plots

Hello

I am solving 4 differential equations on Matlab simultaneously; F'ds(t), F'dr(t), F'qs(t) and F'qr(t) as shown in lines 34-37 on the first screenshot. We, Wb, Rr, Xlr, Xls...are all constants that have been initialised already however Vds and Vqs are sine functions ( line 29 and 30). Matlab solves the equations however when I try to plot the variables it returns blank plots (see the last image). Please kindly assist, thank you in advance.

Answer 1

[Star Strider]

It is not possible to do anything with the images provided.

Perhaps something like:

Fds = vpa(Fds)

figure
fplot(Fds)

and so for the rest of them would do what you want.