Question

imgstr can’t recognize the output string from strcat.

homedir = 'C:\Users\...\images\';
for img = {'01.bmp', '02.bmp', '03.bmp'}
  imgstr = strcat(homedir, img)
  I = imread(imgstr);
end;

outputs:

imgstr = 'C:\Users...\images\01.bmp'
Error using imread>parse_inputs (line 477)
The filename or url argument must be a string.

strcat should be returning a string, not a char array, since my inputs are strings. Shouldn’t it?

Answer 1

Your problem is with how MATLAB iterates over cell arrays. Here’s a related question/answer.

Inside the loop add a {1} to extract the char array, and it should work:

imgstr = strcat(homedir, img{1})