> However, I am still have a problem. > My data matrix(actually representing the image) has narrow scale range. > That was the reason I have to use "imagesc" function which helps to expand the original small range into the large range.
For example, one of my image has range of -0.0298 to 0.0254. So, in this case, only "imagesc" function can clearly shows that the relative expression in image (bright to dark)