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Re: IDL 4.0.1, best way to deal with missing/bad data [message #5775 is a reply to message #5763]

Mon, 12 February 1996 00:00

robert
Messages: 3
Registered: February 1996

Junior Member

: >The question comes as to the best way to handle missing/bad data
: >within IDL. By handle I mean don't use the data in computations, and
: >don't plot it. I can think of three ways:

: There is another way - use the IDL WHERE() function and the capability to
: subscript and array with another.

: read, data, flag
: good = where(flag eq 0)
: data = data(good)
: plot, data

Don't forget to test whether there is any good data at all! If there
isn't, then WHERE returns -1, which will break the data(good) array
subscript. Of course, for some this is not a problem, but maybe I have
worse data than others, and this caught me out at first.

Rob.
--
Robert Bunting E-mail: robert@aurora.york.ac.uk
Space Geophysics Group Tel:(+44)1904-432277
Dept of Physics, University of York, Fax:(+44)1904-432214
York YO1 5DD U.K. WWW: http://aurora.york.ac.uk/

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[Message index]

		Re: IDL 4.0.1, best way to deal with missing/bad data By: rfinch on Wed, 14 February 1996 00:00
		Re: IDL 4.0.1, best way to deal with missing/bad data By: robert on Mon, 12 February 1996 00:00
		Re: IDL 4.0.1, best way to deal with missing/bad data By: rivers on Mon, 12 February 1996 00:00

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