How to plot grey level variation along horizontal cross-section of any image according to position of the mouse?

How to plot grey level variation along horizontal cross-section of any image according to position of the mouse?

Answer 1

[Dishant Arora]

I = imread('cameraman.tif');
[row , column] = size(I);
imshow(I)
[x , ~] = ginput(1);
plot(1:column , I(x , :))

[msahar]

Thank you D. Arora

Answer 2

[Image Analyst]

There is a function specifically built for that. It's called improfile(). It can handle profiles at any angle, though if you know that you want exactly a perfect row or column, the code Dishant gave is the way to go.