write image and display

I want to write H as an image and display. Please help me.

[Adam]

What is H? The letter H or some matrix or what?

Answer 1

[Massimo Zanetti]

Do this.

H=zeros(100);
H(:,10:20)=1;
H(:,80:90)=1;
H(46:55,10:90)=1;
imagesc(H); axis image;

It should be the right H.

[PK]

thanks you!

Answer 2

[Image Analyst]

Or, if you don't want some weird colormap applied by default (like imagesc applies for some reason):

imshow(H, []);

To write H to disk, you can use imwrite() if it's an integer array and you want a standard image format, or use save() if you want to save a floating point image. If you want to save a screenshot of your entire figure/GUI, use export_fig.