MATLAB: How to save to a specific filename in a for loop

save commandsaving variable in a loop

So I have been having this issue for a while and I really would like to figure it out. I have a lot of data at 15 minute intervals and I want it over and hour. I have no issue doing this. The function that I call creates the correct OUTPUT. My issue is that I am not able to save the OUTPUT to a filename that takes the form ['data_1hr_2013',num2str(k)]. I need to figure out a way to save OUTPUT with the filename I create. Any help would be grealy appreciated. I could have sworn I used to do this all the time in previous versions of MATLAB. I am using 2014a now.
for k = 7:12
    matFileName = sprintf('data_15min_2013%d.mat', k);
      if exist(matFileName, 'file')
        matData = load(matFileName);
      else
        fprintf('File %s does not exist.\n', matFileName);
       end
      
   OUTPUT = Conv15min2hr(eval(['matData.data_15min_2013',num2str(k)]));
    save(['data_1hr_2013',num2str(k)],OUTPUT);
end

Best Answer

What on earth is that eval statement supposed to do???
Plus, OUTPUT should be in single quotes when you send it into the save function.
baseMatFileName= sprintf('data_1hr_2013%d.mat', k);
fullMatFileName  = fullfile(folder, baseMatFileName); % folder = pwd or wherever...
save(fullMatFileName, 'OUTPUT');
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