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Re: OR [message #70730 is a reply to message #67037]

Mon, 03 May 2010 15:04

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 5/3/10 3:55 PM, fgg wrote:
> Hello there,
>
> How can I summarize these two lines in just one line of code?
>
> if (line[0] eq 'i_rng_wf' and n_elements(line) ne 4002) then message,
> $
> 'The # of samples per shot is not valid.'
> if (line[0] eq 'i_rng_wf' and n_elements(line) ne 10882) then message,
> $
> 'The # of samples per shot is not valid.'
>
> ...I thought using OR would do the trick, but I guess I'm missing
> something here:
>
> if (line[0] eq 'i_rng_wf' and n_elements(line) ne (4002 or 10882))
> then message, ...
>
> Thanks

Using the bitwise operators, it would be:

if (line[0] eq 'i_rng_wf' and (n_elements(line) ne 4002 or
n_elements(line) ne 10882) then ...

I would consider using logical operators if you only have to be IDL 6.0+
compatible:

if (line[0] eq 'i_rng_wf' && (n_elements(line) ne 4002 ||
n_elements(line) ne 10882) then ...

The logical operators will short-circuit.

-Mike
--
www.michaelgalloy.com
Research Mathematician
Tech-X Corporation

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[Message index]

		Orthorectifying Quickbird scenes with RPC files By: Muhammad on Thu, 25 June 2009 04:46
		Re: OR By: jeanh on Mon, 03 May 2010 16:06
		Re: OR By: Michael Galloy on Mon, 03 May 2010 15:04

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