Too many problems to explain them all (like showing "a", using path as a new variable, not checking for gray scale images, not looping over all rows and columns of "g", etc.). Just try this instead:
% Demo by Image Analyst
% Initialization Steps.
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 18;
a=157;
b=300;
fileList = dir('*.jpg');
for k = 1 : length(fileList)
thisFileName = fullfile(fileList(k).folder,fileList(k).name);
thisImageOriginal = imread(thisFileName);
[rows, columns, numberOfColorChannels] = size(thisImageOriginal);
if numberOfColorChannels < 3
% Skip gray scale images or you'll get an error.
continue;
end
resizedImage = imresize(thisImageOriginal, [628,1200]);
g = mat2cell(resizedImage, [a a a a], [b b b b], 3);
[rowsg, colsg] = size(g);
counter = 1;
for row = 1 : rowsg
for col = 1 : colsg
subplot(rowsg, colsg, counter);
imshow(g{row, col});
counter = counter + 1;
end
end
sgtitle(fileList(k).name, 'FontSize', 16, 'Interpreter', 'none'); % Only in R2018b or later.
promptMessage = sprintf('Do you want to Continue processing,\nor Quit processing?');
titleBarCaption = 'Continue?';
buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
if contains(buttonText, 'Quit', 'IgnoreCase', true)
return; % or break or continue.
end
end
