Re: help with histogram

[Andy Buckle]

On Wed, Jun 8, 2011 at 12:07 PM, plazajp <address@hidden> wrote:
> Hi everyone, I'm new using Octave and I have a problem. Maybe it's easy to
> solve, but I've been unable to do it!
>
>  I need to show the histogram of an uint8 image ('im'), but octave only
> allows me to show it if the image type is changed to double. I don't want
> that, because I want every bin to be on the vector 1:256, not between 0 and
> 1. I've tried to do imhist (im), imhist(im, 1:256), and everything I've
> thought of and I haven't been able to get it. I suppose there has to be a
> way to do it, so I guess someone will be able to tell me where I'm failing.
>
> Thank you for the attention, and I hope someone can tell me the answer!

You can cast to double without renormalizing the range to be 0-1. I
don't understand.

im=floor(rand(16)*256);
hist(im(:), 1:256);

I guess you will need the first arg to hist to be a vector, hence the
(:). Is that what is throwing you?

-- 
/* andy buckle */