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Re: type conversion string -> float [message #63580]

Fri, 14 November 2008 09:17

pgrigis
Messages: 436
Registered: September 2007

Senior Member

I knew somebody would have written that...

I'll go for valid_num...

Ciao,
Paolo

jigga1...@gmail.com wrote:
> There's also valid_num():
>
> http://idlastro.gsfc.nasa.gov/ftp/pro/misc/valid_num.pro
>
> It's nice cause it'll also check an array of strings too.

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Re: type conversion string -> float [message #63581 is a reply to message #63580]

Fri, 14 November 2008 09:02

jigga1206
Messages: 9
Registered: February 2008

Junior Member

There's also valid_num():

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

It's nice cause it'll also check an array of strings too.

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Re: type conversion string -> float [message #63582 is a reply to message #63581]

Fri, 14 November 2008 08:58

Vince Hradil
Messages: 574
Registered: December 1999

Senior Member

On Nov 14, 10:25 am, Paolo <pgri...@gmail.com> wrote:
> Hi,
>
> does anybody have a simple way to find out
> if a string represents a valid float number or not?
>
> For example, it should recognize
> 43
> 123.654773
> 12E-003
> 5.
>
> as valid numbers,
> but should reject
>
> 12B45
> 23-45-2
> 32EE21
> 15$
>
> (Note that float() will happy convert 13A2 but not A132...)
>
> Ciao,
> Paolo

I use Ray Sterner's ISNUMBER()
http://www.astro.washington.edu/deutsch-bin/getpro/library09 .html?ISNUMBER
or http://tinyurl.com/6hgpkv

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