How to populate csv rows, rather than columns? This program creates a csv file with each vectorized image in a column, but i want to know if it's possible to store each vectorized image as a row instead.

myDir = 'imgs2';
f = fullfile(myDir, '*.jpg'); % Change to whatever pattern you need.
theFiles = dir(f);

vector_imag = zeros(28^2, length(theFiles ));

for k = 1 : length(theFiles)
  baseFileName = theFiles(k).name;
  fullFileName = fullfile(myDir, baseFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  imag = imread(fullFileName); %reads image
  imag_gray = rgb2gray(imag); %turns image to grayscale
  imag_28 = imresize(imag_gray, [28 28]); %resizes image
  vector_imag(:,k) = imag_28(:); %vectorizes the image
end

csvwrite('imgdata.csv', vector_imag); %writes vectorized image to csv file

Answer 1

[Guillaume]

It seems trivial to resolve to me:

Either tranpose your matrix when you write it:

csvwrite('imgdata.csv', vector_imag'); 

Or store the images in the rows of your matrix instead of the columns:

vector_imag = zeros(length(theFiles), 28^2);
for k = 1 : length(theFiles)
    %...
    vector_imag(k,:) = imag_28(:); %vectorizes the image
end
csvwrite('imgdata.csv', vector_imag);