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

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');

Answer 1

[Star Strider]

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.

[Andrew Ghali]

i tried that and i get another error that says

Subscripted assignment dimension mismatch.

[Star Strider]

Please post your code. The code I posted ran without error.

[cmptalle]

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!