i have a matrix with positive values, but when im using imshow im getting white plane.Why is it ?

my matrix have values like

 801195.672906465,740500.922136101

and so on.

Answer 1

[Walter Roberson]

imshow() assumes that arrays of type single() or double() are in the range 0 to 1. Your arrays are not in that range. You should use imshow(TheArrayName, []) if you want the maximum value in the array to match to the last color in your color map and you want the minimum value in the array to match to the first color in your color map.