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Re: Existence of a variable
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From: |
Kai Mueller |
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Subject: |
Re: Existence of a variable |
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Date: |
Fri, 8 Jan 1999 11:16:12 +0100 |
On Fri, Jan 08, 1999 at 10:54:43AM +0100, Daniel Tourde wrote:
[snip]
> I hoped that exist(b) will give me 0 or 1 as explained in the help.
> Unfortunately, when I type exist(b), Octave complains and tell me that b
> does not exist, which is what I want to test, the existence of the
> variable b. I do not obtain the 0 value whuch would have been useful in
> a test like this
>
> if (exist(b))
> if (b)
> ...
>
>
> Does anyone has an idea about how I could solve this problem ?
>
if (exist("b")) ... is the correct syntax. Octave expects a
string as argument to exist. Didn't Octave tell that it
expects a string instead of a scalar?
Kai
--
Kai P. Mueller
Control Department (Regelungstechnik) | Phone [+49] (531) 391-3835
Technical University Braunschweig | Fax [+49] (531) 391-5194
D-38092 Braunschweig | Email address@hidden