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histogram produces extra bin in 64-bit IDL 8.0 [message #76030]

Fri, 13 May 2011 06:45

Giuseppe Papa
Messages: 27
Registered: February 2010

Junior Member

Consider the following code:
IDL> D=randomu(32,3200);
IDL> N=histogram(D,min=0.,max=1.,binsize=0.1,Locations=X)

In IDL 32-bit:
IDL> print, size(N)
1 10 3 10
IDL> print, X
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
IDL> print, !version
{ x86 linux unix linux 8.0 Jun 18 2010 32 64}

In 64-bit IDL:
IDL> print, size(N)
1 11 3 11
IDL> print, X
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
IDL> print, !version
{ x86_64 linux unix linux 8.0 Jun 18 2010 64 64}

As you can see, the 64-bit version produces an extra erroneous bin, contrary to the what is expected from the help pages for histogram.

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[Message index]

		histogram produces extra bin in 64-bit IDL 8.0 By: Giuseppe Papa on Fri, 13 May 2011 06:45
		Re: histogram produces extra bin in 64-bit IDL 8.0 By: Dick Jackson on Wed, 18 May 2011 08:56

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