rotation metrics by an angle theta

Hey all ,

I am calculating elemnts of matrix whos size are (X,Y) and after i calculate the elemnets, i want to rotate the matrix by an angle of theta.

For example:

x=linspace(-x1,x1,n);

Unrecognized function or variable 'x1'.

y=linspace(-x1,x1,n);
for i=1:length(x)
    for j=1:length(y)
        H=some_matrix_that_i_create;
        E(x,y,:)=eig(H);
    end
end

So my quesion is how can I rotate the matrix E(:,:,n)? Is there anyway to rotate the whole E?

Thanks a lot in advance!

[Dyuman Joshi]

Define rotating a matrix.

How to rotate a square and a non-square matrix?

Say you have 5x5 square -

y = magic(5)

y = 5×5

17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9

What should be the output when the matrix is rotated by 5 degrees? 15 degrees? 37.5 degrees? 69 degrees? 4.20 degrees?

"No.. I need control over the angle"

You will have to specify what "control" means in this context.

Please provide as much information as possible, so we can understand what you want to do.

[Tomer Segev]

I uploaded an two files that looks the same, except the fact that they are rotated pi/4 with respect to one another. What I want to do is to rotate the matrix that presents their data so that they will be the same again (and not rotated with pi/4)

[Dyuman Joshi]

These seem like streamline plots. Note that rotating matrices is not equal to rotating plots.

Nor do they seem to be rotated w.r.t. each other at pi/4. The center portion/blobs of the plots might seem so, but the rest of the plots do not follow the mentioned rotation.

Answer 1

[Torsten]

I can imagine what it means to rotate a matrix by an angle of 90, 180 or 270 degrees:

https://uk.mathworks.com/help/matlab/ref/rot90.html

Is that sufficient for what you want ?

[Tomer Segev]

Hey,

No.. I need control over the angle