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Re: at-sign in function call


From: David Bateman
Subject: Re: at-sign in function call
Date: Wed, 14 Jun 2006 14:18:07 +0200
User-agent: Mozilla Thunderbird 1.0.6-7.6.20060mdk (X11/20050322)

Wolfgang Lindner wrote:

>Dear Octaver's,
>
>I came across the following call in a file written for 'TheOther'LAB:
>
>mu = 2; sigma = 1;
>x = normrnd(mu, sigma, 1, 10)
>k = (1:1:10)
>anfMu = 0;
>[MU, R, J] = nlinfit(k, x, @constMu, anfMu)
>                           ^^^^^^^^
>                           [1]
>where
>       function [values] = constMu(mu, x)
>       values = mu*ones(size(x));
>
>As far I as can see [1] invokes only a user defined function.
>Using octave 2.1.50 the use of @ in a name produces an error.
>
>Q: what is the meaning of @?
>  
>
This is a function handle.

>   Is it sufficent to use e.g. an inline-function in octave?
>   Or is there a special idea behind the @-constuction and is there
>   an octave eqivalent or a work around?
>  
>
Yes in both recent 2.1.x versions and all 2.9.x versions.

>   What are your recommendations?
>  
>
use a newer version of octave..

D.

-- 
David Bateman                                address@hidden
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