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Re: Object programming with data... [message #30857 is a reply to message #30856]

Sun, 19 May 2002 14:12

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Randall Skelton <rhskelto@atm.ox.ac.uk> writes:
> On a slightly different topic, is it possible to define a function that
> takes an arbitrary number of parameters? i.e. how do I write a function
> 'sum' that takes 'n' variables and sums them? (yes, in this case I could
> use 'total' but that's not the point...)

No fair slipping this at the end of an unrelated post! I usually
don't read David's "gosh golly" articles :-)

The answer to your question is no, and yes. No, there is no construct
in IDL that makes handling an arbitrary number of arguments easy. On
the other hand, yes, it is possible to parse them if you specify all
the parameters explicitly, as in,

PRO MYTOTAL, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10

and so on up to the maximum of 64 (?). Then you access them using the
EXECUTE() function.

for i = 0, n_params()-1 do begin
dummy = execute('x = x + x'+strtrim(i,2))
endfor

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Object programming with data... By: David Fanning on Sun, 19 May 2002 15:28
		Re: Object programming with data... By: David Fanning on Sun, 19 May 2002 15:20
		Re: Object programming with data... By: Randall Skelton on Sun, 19 May 2002 14:22
		Re: Object programming with data... By: Craig Markwardt on Sun, 19 May 2002 14:12
		Re: Object programming with data... By: Randall Skelton on Sun, 19 May 2002 13:12
		Re: Object programming with data... By: David Fanning on Sat, 18 May 2002 07:39
		Re: Object programming with data... By: merlecorp on Wed, 22 May 2002 14:52
		Re: Object programming with data... By: Jaco van Gorkom on Wed, 22 May 2002 08:39
		Re: Object programming with data... By: Pavel A. Romashkin on Thu, 23 May 2002 08:28

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