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Re: problem with arrays of structures [message #10599]

Wed, 07 January 1998 00:00

Martin Schultz
Messages: 515
Registered: August 1997

Senior Member

Theo Brauers wrote:
>
> Hi.
>
> I was trying to copy the contents of an array to an
> element of an array of structures:
>
> FUNCTION test2, str
> r = { a: '', b:1.}
> i=n_elements(str)
> r2 = replicate(r, i)
> help, r2, r2.a
> r2.a=str ; <----------
> r2.b=float(str)
> return, r2
> END
>
> works fine with
> x=test2('100')
> x=test2(['100', '101'])
>
> but fails with
> x=test2(['100'])
>
> Whats am I doing wrong? Or does IDL wrong with
> array of one element?
>

Hi Theo,

you have to use str(0) in the case of 1 element. Replace the marked
lines with

if (i gt 1) then r2.a=str else r2.a=str(0)
if (i gt 1) then r2.b=float(str) else r2.b=float(str(0))

BTW: you are here quite frequently now. Is Franz R. not around ? ;-)

Martin.

------------------------------------------------------------ -------
Dr. Martin Schultz
Department for Earth&Planetary Sciences, Harvard University
186 Pierce Hall, 29 Oxford St., Cambridge, MA-02138, USA

phone: (617)-496-8318
fax : (617)-495-4551

e-mail: mgs@io.harvard.edu
IDL-homepage: http://www-as.harvard.edu/people/staff/mgs/idl/
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		Re: problem with arrays of structures By: Martin Schultz on Wed, 07 January 1998 00:00
		Re: problem with arrays of structures By: Michael Werger on Wed, 07 January 1998 00:00

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