Error while averaging multiple images

I am averaging a set of tif images and here is a code for the same-

addpath('D:\SMM\SLIPI\Images');
files = dir('D:\SMM\SLIPI\Images\*.tif'); 
numberOfImages = size(files); 

for k = 1:numberOfImages
    thisImage = double(imread(files(k).name)); % Or whatever...
    [rows, columns, numberOfColorBands] = size(thisImage);
    % First do a check for matching rows, columns, and number of color channels.  Then
    if k == 1
    sumImage = thisImage;
    else
    sumImage = sumImage + thisImage;
    end
end
    sumImage = sumImage./ numberOfImages;
 

But I am getting following error-

>> low_energy_sequ

Matrix dimensions must agree.

Error in low_energy_sequ (line 14)

sumImage = sumImage./ numberOfImages;

Can somebody please help with this?

Thanks in advance..

Answer 1

[Rik]

The size function returns a vector of at least two elements

numberOfImages = size(files);
%replace this by:
numberOfImages = numel(files);

[FVC Aaqsw]

Worked. Thanks very much