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Re: Comparison operators and floating-point errors [message #70554 is a reply to message #70553]

Mon, 19 April 2010 14:24

MarioIncandenza
Messages: 231
Registered: February 2005

Senior Member

On Apr 19, 1:36 pm, Craig Markwardt <craig.markwa...@gmail.com> wrote:
> Right. Try setting NAN=0.0/0.0 or NAN=!values.f_nan.

OK, so for the purpose of masking an array with a binary mask, I had
been using

MASKED_DATA = DATA / FLOAT(MASK)

and should instead use

MASKED_DATA = (DATA * MASK) / FLOAT(MASK)

in order to ensure that the masked values are all NaN.

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[Message index]

		Re: Comparison operators and floating-point errors By: R.G.Stockwell on Mon, 19 April 2010 15:23
		Re: Comparison operators and floating-point errors By: penteado on Mon, 19 April 2010 14:45
		Re: Comparison operators and floating-point errors By: MarioIncandenza on Mon, 19 April 2010 14:24
		Re: Comparison operators and floating-point errors By: Craig Markwardt on Mon, 19 April 2010 13:36
		Re: Comparison operators and floating-point errors By: penteado on Mon, 19 April 2010 12:18

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