MATLAB: I’m trying to create Matrices Index or subscript

faq 4.6matrices indexmatrices subscribt

Hello guys
I wish you help me with my issue. I am trying to put a subscript or index to a group of matrices. I tried the following short code which did not work. The code is showed below.
>> x=[1 2 3;4 5 6;7 8 9]
x =
     1     2     3
     4     5     6
     7     8     9
>> u=1;
>> for i=1:3
y_u=i*x;
u=u+1;
end
>> y_1
??? Undefined function or variable 'y_1'.
Thank you in advance

Best Answer

Do not program that way in MATLAB!
You want this:
x = [1 2 3;4 5 6;7 8 9];
for ii = 1:3
  y{ii} = ii*x;  % Notice {} and not ()
end
Now you have a cell array that has as each element a matrix:
y{1}
y{2}
y{3}
If you want to make ii go much further than 3, you should pre-allocate the memory for y first...
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