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Re: mean() function [message #46933 is a reply to message #46930]

Tue, 10 January 2006 15:13

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Kenneth Bowman wrote:
> In article <1136932449.216202.42760@g44g2000cwa.googlegroups.com>,
> biocpu@yahoo.com wrote:
>
>
>> y = fltarr(1008879)+35
>
>
> Looks like roundoff error to me
>
> IDL> y = fltarr(1008879)+35
> IDL> print, mean(y)
> 35.0497
> IDL> print, mean(y, /double)
> 35.000000
> IDL> y = dblarr(1008879)+35
> IDL> print, mean(y)
> 35.000000

Huh. I don't see this in single precision (see other post). What version of IDL did you use?

paulv

--
Paul van Delst
CIMSS @ NOAA/NCEP/EMC

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[Message index]

		Re: mean() function By: Maarten[1] on Thu, 12 January 2006 03:07
		Re: mean() function By: Paolo Grigis on Wed, 11 January 2006 06:19
		Re: mean() function By: Nigel Wade on Wed, 11 January 2006 01:49
		Re: mean() function By: Kenneth P. Bowman on Tue, 10 January 2006 19:22
		Re: mean() function By: biocpu on Tue, 10 January 2006 16:18
		Re: mean() function By: Paul Van Delst[1] on Tue, 10 January 2006 15:13
		Re: mean() function By: Paul Van Delst[1] on Tue, 10 January 2006 15:09
		Re: mean() function By: David Fanning on Tue, 10 January 2006 15:07
		Re: mean() function By: K. Bowman on Tue, 10 January 2006 15:00
		Re: mean() function By: Foldy Lajos on Tue, 10 January 2006 14:53
		Re: mean() function By: R.Bauer on Sun, 15 January 2006 00:58
		Re: mean() function By: savoie on Thu, 12 January 2006 08:49

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