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Re: HISTOGRAM [message #82943 is a reply to message #44556]

Wed, 23 January 2013 03:44

Helder Marchetto
Messages: 520
Registered: November 2011

Senior Member

On Wednesday, January 23, 2013 12:12:54 PM UTC+1, dave poreh wrote:
> Folks,
>
> HI,
>
> I am trying to plot:
>
> IDL> hist = HISTOGRAM(x(2,*),MIN = -400, MAX =100, BINSIZE = 4)
>
> % Program caused arithmetic error: Floating illegal operand
>
> Turns out, with cg's everything is ok.
>
> Can you please help me?
>
> Cheers,
>
> Dave

I'm not a histogram expert, but I had problems for badly defined BINSIZEs.
If you read cgHistoplot help/definition of binsize you will find:
"I've tried to protect you from most of the bad things"
And:
"While it is pointed out in the HISTOGRAM documentation, it is extremely important that the BINSIZE be of the same data type as the data you are going to calculate the histogram of."

You put in binsize 4. Are your data integers? If not you might have a look at that...

Cheers,
Helder

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[Message index]

		Histogram By: James[1] on Tue, 28 June 2005 09:24
		Re: Histogram By: R.G. Stockwell on Fri, 01 July 2005 11:37
		Re: histogram By: rinceboy on Wed, 12 August 2009 07:12
		Re: histogram By: jameskuyper on Wed, 12 August 2009 06:15
		Re: histogram By: rinceboy on Wed, 12 August 2009 04:00
		Re: histogram By: David Fanning on Tue, 11 August 2009 10:17
		Re: histogram By: Maxwell Peck on Mon, 29 March 2010 03:08
		Re: Histogram By: David Grier on Mon, 11 October 2010 07:16
		Re: Histogram By: David Fanning on Mon, 11 October 2010 06:51
		Re: HISTOGRAM By: d.poreh on Wed, 23 January 2013 05:06
		Re: HISTOGRAM By: Helder Marchetto on Wed, 23 January 2013 03:44
		Re: HISTOGRAM By: Mats Löfdahl on Wed, 23 January 2013 03:26

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