how to concatenate matrix horizontally for a large number of matrices in a for loop

For example,

I am doing data analysis of a matrix of A whose dimension is 175x90. Since I analyze this dataset one by one such that A(:,1), A(:,2)...A(:,90). In the end, I hope I could still obtain a matrix of of B whose dimension is also 175x90. So I decided to use "horzcat" command such that B=horzcat(A(:,1), A(:,2)...A(:,90)). However, since there could be a really large number for me to concatenate, how can I achieve this in a loop rather than do this manually?

Thank you so much!

[Walter Roberson]

B = A;

would have the same effect as that horzcat()

[Taoooooooooooo]

Hi Walter,

Thanks for answering. However, since I was supposed to anaylize the data one by one, and the final output becomes (175x1) instead (175x90). Therefore, I need a for loop to combine them back to the same dimension of the original file.

Tao

Answer 1

[Walter Roberson]

numrow = size(A,1);
numcol = size(A,2);
B = zeros(numrow, numcol)
for column = 1 : numcol
    this_column = A(:,column);
    .....
    this_result = ...
    B(:,column) = this_result;
end