How do a write a loop code in MATLAB?

How do I impliment a "for loop" into this code?

for r = 1 : numPlotsR
    for c = 1 : numPlotsC   
        subplot(numPlotsR, numPlotsC, plotIndex);
        rgbBlock = ca{r,c};        imshow(rgbBlock); 
        [rowsB, columnsB, numberOfColorBandsB] = size(rgbBlock);
        caption = sprintf('Block #%d of %d\n%d rows by %d columns', ...
            plotIndex, numPlotsR*numPlotsC, rowsB, columnsB);
        title(caption);        drawnow;
        xlswrite(NewID,rgbBlock);
        plotIndex = plotIndex + 1;
        img1=rgbBlock;
        imshow(img1)

[Bob Thompson]

I don't understand your question. You have two for loops set up already for the code. What do you mean by, "impliment a 'for loop' into this code?"

Answer 1

[Jim Riggs]

A "for" loop requires an "end" statement:

for r=1:numPlotsR
    for c=1:numPlotsC
        ...
        ...
    end
end