Ho to perform the same calculation in all columns of a matrix?

Hi all,

I would like to perform "adtest" in all columns of my matrix sized 200x90 without having a loop iterating 90 times. I just wondered if there a way of getting a vector of 1x90 each value indicates the "adtest" of each column?

Thanks a lot in advance!

Answer 1

[Star Strider]

This works:

D = randi(9, 15, 5);                                            % Create Data
Dc = mat2cell(D, size(D,1), ones(1,size(D,2)));                 % Split Into Cells By Column
adt = cellfun(@adtest, Dc);                                     % Perform ‘adtest’ On Each Cell Column

It takes advantage of MATLAB’s cell data type to ‘parse’ the input matrix into individual column cells, then uses cellful to perform adtest on each cell column. The result in ‘adt’ is a logical array of results.

EDIT — To get other results from adtest, add a variable to store them to the output of the cellfun call. So to get the significance as well, this works:

[adt,p] = cellfun(@adtest, Dc);                                 % Perform ‘adtest’ On Each Cell Column