Image display of object assuming arbitrary values
AutoImage(img [,x,y])
2-d image
where x and y are vectors, specifies the labeling of X- and Y-axes, but produces the same image as AutoImage(img).
If the object is already scaled to the range (0,255) you may use GrayImage.
Side Effects The object img, assuming arbitrary values, is scaled to the range (0,255) and displayed as an image with 256 shades of gray.