how to display image from array coloring specific values in white

Hi,

I have a 501x501 matrix.

This matrix contains some values and zero values like below matrix.

a =

1 2 3 8 4

4 7 0 9 1

8 0 0 0 1

9 3 0 6 7

9 4 7 2 7

I want to display image from this kind of array coloring zero values in white because i cannot do this using image func image(a,'CDataMapping','scaled')

How can i do this?

thank,

Answer 1

[Walter Roberson]

color_in_white_here = double(a == 0);
white_color = ones(size(a,1), size(a,2), 3);
image(a, 'CDataMapping','scaled');
hold on
image(white_color, 'AlphaData', color_in_white_here);
hold off