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Re: Compare two variables [message #61281 is a reply to message #61277]

Mon, 14 July 2008 01:09

Joost Aan de Brugh
Messages: 16
Registered: July 2008

Junior Member

Hello Dave,

> hi Joost
> but i work with float data. as you said this metheod works for
> integer. could we modify it to work for non integer data?
> Cheers
> Dave

That is a pity. But isn't that dangerous in any case. If A and B are
floats then the expression A eq B is not reliable because of
continuous rounding. It may still be reliable if absolutely no
arithmetic is involved.

The compression trick does not work for floats, because of the degree
of infinity.

Maybe a two-step filtering is apropriate

idx1 = Where(B[2,*] = A[0,j]) ; in for-loop or with the matrix-trick I
did with DA and DB.
inbetweenresult = B[*,idx1]

idx2 = Where(inbetweenresult[3,*] = A[1,j]) ; in for-loop or with the
matrix-trick I did with DA and DB.
result = inbetweenresult[*,idx2]

Cheers,
Joost

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[Message index]

		Re: Compare two variables By: d.poreh on Mon, 14 July 2008 06:00
		Re: Compare two variables By: ben.bighair on Mon, 14 July 2008 04:57
		Re: Compare two variables By: Joost Aan de Brugh on Mon, 14 July 2008 01:09
		Re: Compare two variables By: Sven Geier on Sat, 12 July 2008 12:54
		Re: Compare two variables By: d.poreh on Sat, 12 July 2008 06:18
		Re: Compare two variables By: d.poreh on Fri, 11 July 2008 10:14
		Re: Compare two variables By: Jean H. on Fri, 11 July 2008 08:49
		Re: Compare two variables By: Joost Aan de Brugh on Fri, 11 July 2008 08:41

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