while loop for changing vairable

I was curious if I could use a "while" loop to change a value inside a matrix to create a series of matrices. I created an array for theta which is 1x37. I was thinking maybe creating a while loop that could take one index at a time and produce a new matrix. Any help is appreciated, thank you.

theta = [-90:5:90]

m = sind(theta);

n = cosd(theta);

[Rik]

This is an example of the XY problem. You should not presume a while loop is the solution without a clear description of the problem. You haven't described what you want to do with sufficient detail for someone to be able to give an answer.

[andrew krugle]

Sorry for being unclear, my code is below, what I want to do is create an array of values for theta, from 90 to -90 and would like to plug them into my matrix with my variables m and n which are the function of changing theta. So in the end I would have created 37 new 6x6 matrices.

theta = [-90:5:90]
m = sind(theta);
n = cosd(theta);

T = [m^2 n^2 0 0 0 2*m*n; 
    n^2 m^2 0 0 0 -2*m*n;
    0 0 1 0 0 0;
    0 0 0 m -n 0;
    0 0 0 n m 0; 
    -m*n m*n 0 0 0 m^2-n^2]

Answer 1

[Walter Roberson]

theta = [-90:5:90]
M = sind(theta);
N = cosd(theta);
T = arrayfun(@(m,n)[m^2 n^2 0 0 0 2*m*n; 
  n^2 m^2 0 0 0 -2*m*n;
  0 0 1 0 0 0;
  0 0 0 m -n 0;
  0 0 0 n m 0; 
  -m*n m*n 0 0 0 m^2-n^2], M, N, 'uniform', 0);

[andrew krugle]

Walter thank you very much!! Exactly what I needed. I saw that it created T with 37 6x6 matrices. Out of curiousity since I've never done matrices within an array and pulling values out, I saw that it created T{1,2},T{1,2} T{1,3}...T{1,37}. If I wanted to pull the first column out of T{1,2} could I create a new vairable such as

C1 = T{1,2}(:,2)

[Walter Roberson]

C1 = T{1,2}(:,1)

for first column ;-)

col1 = celfun(@(C) C(:,1), T, 'uniform', 0)

to get all of the column 1. You could then proceed to

col1mat = horzcat(col1{:});

to get a 6 x 37 matrix of column 1's

[andrew krugle]

You're amazing, Thank you so much