User_guide.pdf 讀後問題

1 . MATLAB在打程式碼後按下ENTER後就不能修改了,有甚麼方法解決?

程式碼問題
2 . background = imopen(I,strel('disk',15));
figure, imshow(background)

3 . figure, surf(double(background(1:8:end,1:8:end))),zlim([0 255]);
set(gca,'ydir','reverse');

4 . [labeled,numObjects] = bwlabel(bw,4);
numObjects