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Re: Match Histogram Binsize with Data Type [message #83456 is a reply to message #83445]

Tue, 05 March 2013 10:58

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Fabien writes:

> Regardless of the probably wrong things that have been published and
> will be published in the future, I don't see the point of using a .5
> binsize with integer data, and I don't think the behaviour of histogram
> is defined in this case.

Well, the 22.5 represents the 16 directions around a compass where I
wish to draw something (360/16=22.5). The number 22 just ain't gonna get
it done in this case. :-)

Plus, I didn't *know* the data was integer type. It was a variable that
came from somewhere else.

I'm saying, you have to do a hell of a lot of checking to get things
right. I know, because I do the checking in cgHistoplot. In fact, I've
written code to do the job (Convert_To_Type, for example).

It seems to me Histogram ought to do a little bit of checking on its own
if it is going to be so damn obstinate about returning incorrect values,
just because you didn't read the small print and know what the rules
were.

Histogram is great. It just isn't user friendly. And, for such an
important routine in IDL, it ought to be.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Match Histogram Binsize with Data Type By: David Fanning on Wed, 06 March 2013 05:08
		Re: Match Histogram Binsize with Data Type By: David Fanning on Wed, 06 March 2013 04:25
		Re: Match Histogram Binsize with Data Type By: Jeremy Bailin on Tue, 05 March 2013 21:32
		Re: Match Histogram Binsize with Data Type By: David Fanning on Tue, 05 March 2013 10:58
		Re: Match Histogram Binsize with Data Type By: Fabzi on Tue, 05 March 2013 10:37
		Re: Match Histogram Binsize with Data Type By: Paul Van Delst[1] on Thu, 07 March 2013 09:51

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