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Re: IDL 4.0.1, best way to deal with missing/bad data [message #5842 is a reply to message #5783]

Sat, 17 February 1996 00:00

thompson
Messages: 584
Registered: August 1991

Senior Member

rfinch@toe.CS.Berkeley.EDU (Ralph Finch) writes:

(stuff deleted)

> I've talked to RSI about this problem; they think that the next
> release, all computational routines will recognize missing data with
> the /NAN keyword, so all you have to do is replace your missing values
> with NANs. For now I guess I will use the following construct:

The trouble with using NaN values is that not all computers use IEEE floating
point notation. Specifically, I'm talking about the VAX floating point
notation used in VMS, which is still an extremely important platform to us.
(As far as I'm aware, that may be the only exception among modern computers.)

Perhaps RSI has figured out a way around this difficulty.

Bill Thompson

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[Message index]

		IDL 4.0.1, best way to deal with missing/bad data By: rfinch on Fri, 09 February 1996 00:00
		Re: IDL 4.0.1, best way to deal with missing/bad data By: f055 on Thu, 22 February 1996 00:00
		Re: IDL 4.0.1, best way to deal with missing/bad data By: rfinch on Mon, 19 February 1996 00:00
		Re: IDL 4.0.1, best way to deal with missing/bad data By: thompson on Sat, 17 February 1996 00:00

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