Performing pdist2 in a for-loop with varying lengths of arrays

Hi,

I have a for loop that calls a .mat file one by one from a folder and compares it to a separate baseline .mat file. My code (has been modified for readability) goes something like this:

a = load ('H:\Actor 01 Normal Intensity Only\Actor01.mat
%baseline .mat file

%then loads the baseline data into array 
neutralRMSdata = a.RMSFramesMat;

for k = 1:length(myFiles)
%runs through the folder

%file information
  baseFileName = myFiles(k).name;
  FileName=[baseFileName,num2str(baseFileName)] ;
  fullFileName = fullfile(myfolder, baseFileName);

%loads the data for the file that I want to compare to baseline neutralRMS
  b = load (fullFileName);

%puts it into an array, size varies as the loop runs through the 32 files!!!
  FileRMSdata = b.RMSFramesMat;

EucDist = pdist2(neutralRMSdata, FileRMSdata, 'hamming');
 %this doesn't work because the size of FileRMSdata isn't the same as the neutralRMS array, 
%and the size of the FileRMSdata changes with each loop iteration 

end

So I need to be able to compare the length of the FileRMS each loop iteration with the length of NeutralRMS, and then either

a) pad the end of the shorter file with NaN values in order to complete the pdist2.

b) interpolate the shorter of the two arrays and then I should be able to run pdist2

Any help welcome!! Thanks, Chris

Any ideas?

Answer 1

[Image Analyst]

How about

if isequal(a, b)
     % Structures a and b match completely.
end

[Chris Matthews]

Thanks for the answer, i need though, to be able to change the size of the smaller matrix so I can compare each value within the matrix to the neutral matrix. Any idea how I can do this as part of the for loop?

Like:

Take file matrix

Determine length of file matrix

Compare to length of neutral matrix

Either extend neutral matrix or file matrix to same size as other with NaN

Continue with loop

[Chris Matthews]

FYI - I ended up creating a if/then/elseif to Interpol the smallest of the arrays to match the length, thanks for the idea.