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Re: Missing Data Programming Contest [message #65998 is a reply to message #65997]

Wed, 08 April 2009 11:26

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Suppose you are expecting a data array and you suspect
> the data has "missing values" in it that you wish to
> exclude from further processing. You write a keyword
> for your routine that allows the user to pass in what
> he is using for the "missing value".
>
> PRO Junker, data, MISSING_VALUE=missing_value
>
> How would you write the code to assure that this missing
> value would be excluded from further processing?
>
> You should assume:
>
> 1. The data can be any data type except complex or string.
>
> 2. The missing value *could* be !VALUES.F_NAN.
>
> 3. Unsophisticated users might be using your program,
> so, for example, they might pass in a missing value
> such as 594.32.

Humm. The only really useful suggestion I've heard so
far (I forgot my German dictionary today, so I'm not
sure about Reimar's contribution) is to delete the
MISSING_VALUE keyword and let the user worry about
it. Surely this can't be the ONLY suggestion!

Cheers,

David
--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Missing Data Programming Contest By: David Fanning on Thu, 09 April 2009 09:34
		Re: Missing Data Programming Contest By: R.Bauer on Thu, 09 April 2009 09:22
		Re: Missing Data Programming Contest By: David Fanning on Thu, 09 April 2009 08:59
		Re: Missing Data Programming Contest By: Homeyer on Thu, 09 April 2009 05:41
		Re: Missing Data Programming Contest By: Carsten Lechte on Thu, 09 April 2009 01:51
		Re: Missing Data Programming Contest By: R.Bauer on Thu, 09 April 2009 01:32
		Re: Missing Data Programming Contest By: Homeyer on Wed, 08 April 2009 16:26
		Re: Missing Data Programming Contest By: Homeyer on Wed, 08 April 2009 16:02
		Re: Missing Data Programming Contest By: wlandsman on Wed, 08 April 2009 12:11
		Re: Missing Data Programming Contest By: David Fanning on Wed, 08 April 2009 11:26
		Re: Missing Data Programming Contest By: R.Bauer on Wed, 08 April 2009 07:27
		Re: Missing Data Programming Contest By: R.Bauer on Wed, 08 April 2009 07:21
		Re: Missing Data Programming Contest By: David Fanning on Wed, 08 April 2009 07:03

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