First you need to figure out the size of your image - whethre it is an intensity-image or an rgb-image:
imsz = size(img);
Once you know this you need to select row or column to plot
idx_row = 280;
idx_col = 520;
Then were good to start.
subplot(3,3,[1 2 4 5])
imagesc(img)
hold on
plot(idx_col*ones(size(1:imsz(1))),1:imsz(1),'c')
plot(1:imsz(2),idx_row*ones(size(1:imsz(2))),'r')
if numel(imsz) == 3
subplot(3,3,7:8)
rgbplot(squeeze(img(idx_row,:,:)))
subplot(3,3,[3,6])
ph = plot(squeeze(img(:,idx_col,:)),1:imsz(1));
set(ph(1),'color','r')
set(ph(2),'color','g')
set(ph(3),'color','b')
else
subplot(3,3,7:8)
plot(img(idx_row,:))
subplot(3,3,[3,6])
plot(squeeze(img(:,idx_col)),1:imsz(1));
end
From there you can continue with zooming into regions on the row and column-panels as you see fit and then possibly select the corresponding indices and replot only those row or column-parts.
HTH
