How to save the output of a function in an array or cell?

I have a function which is called from within a script. The function is in a between a for loop. So basically everytime the Function runs for one file then comes back to script and runs it again for another file. I get the output of function as

d = [23 78]

then for next file it would give me

d = [503 20]

There could also be

d = [234 439 
     783 48]

The columns are always 2 but the rows could be more than one. How can I have an array as:

final = [23   78
         503  20
         234  439
         783  48]

Is there a way to populate an array with the function output? Thanks for your help is advance.

Answer 1

[Kye Taylor]

I'm going to assume that the function which returns a matrix with r rows and 2 columns is named

returnTwo.m

Then use something like

nNewRows = 100;
maxRowsExpectedInOutput = 10; % guess the largest number of rows returned 
d = zeros(nNewRows,2); % preallocate enough space for 100 rows initially
idx = 1;  % the index where there is no data in d

for i = 1:numIt
  tempOut = returnTwo(); % tempOut is r-by-2 matrix
  d(idx:idx+size(tempOut,1) - 1,:) = tempOut;
  idx = idx + size(tempOut,1); % increment idx appropriately
  % check if d needs more rows added
  if size(d,1)-idx <= maxRowsExpectedInOutput 
    d = [d;zeros(100,2)]; % add another 100 rows to d
  end
end