vectors must be the same length ode45 plotting functions

We're trying to plot two functions on a figure from a diff equation ode45, the first one is f(t)=o, and the other one is h(o)=S.

the first one is showing on the figure but the second one is apparently wrong. how am I supposed to plot (o,S)???

every term is defined before the plot codes and under the ode45.

hold on

plot(t,o) (a graph is showen to this one)

plot(o,S) (how am I supposed to plot this ?)

error message every time we run:

(Error using plot

Vectors must be the same length.)

[Torsten]

Did you check whether o and S have the same length ?

[Noella Makhlouta]

how do we check if they have the same length ? for they have differnet dimensions.

S is supposed to be a force, and the diff equation is o(2,1).

[madhan ravi]

Man just upload your code.

[Torsten]

Before the plot command, write

size(o)
size(S)

in your code.

What do you get ?

[Noella Makhlouta]

I'm getting this

ans = 7837 2

ans = 1 1

I can't paste the code due to plagiarism.

[KSSV]

YOu cannot plot that.....MAy be you are looking for

plot(t,o)

[madhan ravi]

plot(o,S*ones(size(o)))

[comment moved to answer section]

[Noella Makhlouta]

I got now two sine waves which blong to plot(t,o) and a straight line. The question is to plot S as a function of o.

[Noella Makhlouta]

thank you so much, you saved my life. <<<<3

Answer 1

[madhan ravi]

https://in.mathworks.com/matlabcentral/answers/448407-vectors-must-be-the-same-length-ode45-plotting-functions#comment_678078