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Re: Testing validity of numerical content of a string [message #51821 is a reply to message #51744]

Thu, 07 December 2006 10:18

Brian Larsen
Messages: 270
Registered: June 2006

Senior Member

Excellent solution. I haven't played with on_ioerror but certainly
will now.

Funny how you get stuck in a rut of how you normally do things even if
its not the best, in fact probably never the best way :)

Brian

mgalloy@gmail.com wrote:
> Sven Geier wrote:
>> In a pinch one might just force the conversion and catch any resulting
>> error-messages with ON_ERROR -- that's ugly, but might be a lot easier than
>> trying to parse strings...
>
> So here's some code that does that:
>
> function validate_numeric, value
> compile_opt strictarr
>
> on_ioerror, badValue
>
> f = float(value)
> return, 1B
>
> badValue: return, 0B
> end
>
> The odd thing about this is what IDL will do without complaining. IDL
> will do this without any error:
>
> IDL> help, float('0.0hello5')
> <Expression> FLOAT = 0.00000
>
> but draws the line at:
>
> IDL> help, float('hello5')
> % Type conversion error: Unable to convert given STRING to Float.
> % Detected at: $MAIN$
> <Expression> FLOAT = 0.00000
>
> Mike
> --
> www.michaelgalloy.com

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[Message index]

		Testing validity of numerical content of a string By: Y.T. on Wed, 06 December 2006 17:29
		Re: Testing validity of numerical content of a string By: Brian Larsen on Thu, 07 December 2006 10:18
		Re: Testing validity of numerical content of a string By: Bob[3] on Thu, 07 December 2006 10:08
		Re: Testing validity of numerical content of a string By: Michael Galloy on Thu, 07 December 2006 09:43
		Re: Testing validity of numerical content of a string By: Sven Geier on Wed, 06 December 2006 22:21

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