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Re: how to tell it is character or it is number? [message #55218 is a reply to message #55213]

Tue, 07 August 2007 08:38

wlandsman
Messages: 743
Registered: June 2000

Senior Member

> Is there a way I can tell whether it is numbers or it is characters?
> 'fix' command can convert the numbers, it will give an error message
> then continue to the execution.

There are lots of programs around to do this, with two variants. The
first tests, as you suggest, whether IDL can convert the string into a
numeric value

http://idlastro.gsfc.nasa.gov/ftp/pro/misc/strnumber.pro

But IDL will consider the string '1qz_3' to be a valid number (=1) so
if you want a more usual interpretation, you need a more detailed
test of whether the ordering of digits, letters and decimal points
make sense as in

http://idlastro.gsfc.nasa.gov/ftp/pro/misc/valid_num.pro

--Wayne

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[Message index]

		Re: how to tell it is character or it is number? By: queiny on Tue, 07 August 2007 10:59
		Re: how to tell it is character or it is number? By: Haje Korth on Tue, 07 August 2007 10:48
		Re: how to tell it is character or it is number? By: Conor on Tue, 07 August 2007 10:41
		Re: how to tell it is character or it is number? By: wlandsman on Tue, 07 August 2007 08:38

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