How do I plot time vs. velocity with a matrix in Simulink ?

Hi everyone.

I have a 1370x2 matrix where the first column is the time and second column is velocity.

I want to plot Time vs Velocity in x and y axis respectively.

Is there any block in Simulink that can help me with that ?

Thanks.

Answer 1

[Sam Chak]

@Nuri Efe TATLI

In MATLAB, if a matrix M is given, then this would be:

t = M(:,1);     % 1st column
V = M(:,2);     % 2nd column
plot(t, V)      % plotting V vs. t

However, in Simulink, it's a little complicated. Luckily, you can use a MATLAB Function block to do wonders.

Double-click the block and enter this code:

function plotfcn(u)

t = u(:,1);

V = u(:,2);

coder.extrinsic('plot')

plot(t, V, 'linewidth', 1.5)

grid on

xlabel('t')

ylabel('V')

[Nuri Efe TATLI]

This is superb thank you very much.

Also can i create more than 1 figures with this on Simulink ?

Because only 1 figure appears when i run my simulation.

[Sam Chak]

Yes you can.

function plotfcn(u)

t = u(:,1);

V = u(:,2);

coder.extrinsic('plot')

figure(1)

plot(t, V, 'linewidth', 1.5)

figure(2)

plot(t, sqrt(V), 'linewidth', 1.5)