Matrix dimensions must agree error when converting from jg2 to tiff

I'm sort of confused... I'm trying to covert a folder of jp2's to tiffs and here's my code..... idk what's wrong with it and why matricies are even involved... Plz help!!!

% Specify the folder where the files live.
myFolder = '/Users/ironmanroxx/Desktop/VeggiesDownload/Extracted_Images';
% Check to make sure that folder actually exists.  Warn user if it doesn't.
if ~isdir(myFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
  uiwait(warndlg(errorMessage));
  return;
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, '*.jp2'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
  baseFileName = theFiles(k).name;
  fullFileName = fullfile(myFolder, baseFileName);
  [folder, baseFileNameYeet, extension] = fileparts(fullFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  
  
  % Now do whatever you want with this file name,
  % such as reading it in as an image array with imread()
  
  img = imread(fullFileName);
  
  imageArray = imread(fullFileName);
  imshow(imageArray);  % Display image.
  drawnow; % Force display to update immediately.
  
  imwrite(img, baseFileNameYeet + '.tiff');
end

[Geoff Hayes]

Isaac - which line is throwing the error message? Please copy and paste all of the red text (from the error) into this question. Am curious about

img = imread(fullFileName);
imageArray = imread(fullFileName);

Are both necessary?

[Isaac Lau]

Thank you for your response!

uhh no both lines are not necessary... only the first.... the second was left over from sample code from matlab and i just included it to make sure the program ran properly....

the error message occurs when i try to run imwrite i believe

I tried just running imread and imwrite on the jpg2 file itself and i still get the matrix error.... i suppose my jp2 file is quite large... its around 100mb and a satellite image download but i don't think that should be a problem

[Geoff Hayes]

Isaac - it may still be helpful to copy and paste the full error message.

[Isaac Lau]

Will do so in the future. Walter's answer helped!

Answer 1

[Walter Roberson]

fileparts returns character vectors, not string objects. baseFileNameYeet is a character vector. You are trying to do arithmetic when you use + between two character vectors, and that will fail unless the two character vectors are the same length or one of the two character vectors is scalar.

If you have R2017a or later you could change the + '.tiff' to + ".tiff" . That would make use of string objects, for which + is defined as concatenation.