MATLAB Answers

Colormap with Image command

3 views (last 30 days)
I'm trying to plot intensity levels from an 8-by-8 matrix A whose values vary from 0 to 1. As a start, I entered the following,
The result produces a colorbar whose values appear to increase from 0 to 60. I have no idea where the "60" is coming from. More problematic is that the entries of A are so small that I don't see any color variation in the image. It appears monochromatic. Of course, I can scale A by a large number, but this seems to mess up the colorbar values.
How can I change input into the image and/or colormap commands so as to see different colors? Of course, I can just multiply A by a large number, but this messes up the scaling on the colorbar. Also, I want the colorbar labels to increase from 0 to 1.
Any help would be appreciated.


Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 17 Nov 2013
I think if you check, you will find that max(A(:)) is only 60.

  1 Comment

Paul Fishback
Paul Fishback on 18 Nov 2013
Actually I used max(max(A)) to get a number less than one. But I do see that using imagesc as opposed to image takes care of what I need. Thanks.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!