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Re: histogram function question [message #90524 is a reply to message #90517]

Fri, 06 March 2015 08:08

Burch
Messages: 28
Registered: December 2013

Junior Member

On Friday, March 6, 2015 at 8:03:05 AM UTC-6, Dae-Kyu Shin wrote:
> hi
>
> here is a example code
>
>
> data = [0, 0.3, 1.3d]
> h1 = HISTOGRAM(data, nbin=3, min=0, max=1, loc=loc1)
> h2 = HISTOGRAM(data, binsize=0.5d, min=0, max=1, loc=loc2)
>
> print, h1
> print, h2
>
> h1 = 2 0 1
> h2 = 2 0 0
>
>
> h1 and h2 is not equal!!
> is it correct??
>
>
> thanks

There is a note in the documentation for the MAX keyword:

"Note: If NBINS is specified, the value for MAX will be adjusted to NBINS*BINSIZE + MIN. This ensures that the last bin has the same width as the other bins."

So it seems for h1 BINSIZE is calculated to be

(max - min)/(nbins-1) = 0.5

and then max is adjusted to

nbins*binsize + min = 1.5,

whereas in h2 there is no *internal* adjustment to MAX.

-Jeff

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[Message index]

		histogram function question By: Dae-Kyu Shin on Fri, 06 March 2015 06:03
		Re: histogram function question By: Heinz Stege on Fri, 06 March 2015 06:22
		Re: histogram function question By: Dae-Kyu Shin on Fri, 06 March 2015 06:24
		Re: histogram function question By: David Fanning on Fri, 06 March 2015 06:26
		Re: histogram function question By: Matthew Argall on Fri, 06 March 2015 06:27
		Re: histogram function question By: Matthew Argall on Fri, 06 March 2015 06:31
		Re: histogram function question By: Helder Marchetto on Fri, 06 March 2015 07:15
		Re: histogram function question By: Burch on Fri, 06 March 2015 08:08
		Re: histogram function question By: Helder Marchetto on Fri, 06 March 2015 08:28
		Re: histogram function question By: Heinz Stege on Fri, 06 March 2015 08:43
		Re: histogram function question By: Fabzi on Fri, 06 March 2015 09:48

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