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In an assignment A(:) = B, the number of elements in A and B must be the same.

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Andrew Ghali
Andrew Ghali 2015-10-12
评论： cmptalle 2018-1-30
im trying to graph the sin and cos graph on the same graph and the error that keeps appearing is
"In an assignment A(:) = B, the number of elements in A and B must be the same."
Here is the code that ive put in my script.
x=[0:0.01:2*pi];
y(1)=cos(x);
y(2)=sin(x);
plot(x,y(1),'-k',x,y(2),'--b');

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回答（1 个）

Star Strider
Star Strider 2015-10-12
You’re creating a matrix (which is also good programming practice in this instance), but not quite correctly. To create ‘y(1)’ as the first row, you need to add a column dimension to it, using the colon operator (:) to define it:
x=[0:0.01:2*pi];
y(1,:)=cos(x);
y(2,:)=sin(x);
plot(x,y(1,:),'-k',x,y(2,:),'--b')
This should produce the result you want.
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cmptalle
cmptalle 2018-1-30
I've been looking for ages for someone to tell me how to fix this rather than just explaining what the error meant, thank you!

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