vectors must be the same length ode45 plotting functions

2019 3 5
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更新时间：2019 3 6
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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.)

9 个评论
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Torsten
Torsten 2019-3-5
Did you check whether o and S have the same length ?
Noella Makhlouta
Noella Makhlouta 2019-3-5
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).
Torsten
Torsten 2019-3-6
Before the plot command, write
size(o)
size(S)
in your code.
What do you get ?
Noella Makhlouta
Noella Makhlouta 2019-3-6
I'm getting this
ans = 7837 2
ans = 1 1
I can't paste the code due to plagiarism.
KSSV
KSSV 2019-3-6
YOu cannot plot that.....MAy be you are looking for
plot(t,o)
madhan ravi
madhan ravi 2019-3-6
编辑：madhan ravi 2019-3-6
plot(o,S*ones(size(o)))
[comment moved to answer section]
Noella Makhlouta
Noella Makhlouta 2019-3-6
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
Noella Makhlouta 2019-3-6
thank you so much, you saved my life. <<<<3

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