From help-request at octave dot org Wed Jan 11 12:56:02 2006
Subject: Re: function file question and plot using polar coordinates
From: "Tetsuji \"Maverick\" Rai" <maverick31337 at gmail dot com>
To: Shai Ayal <shaia at biocontrol dot co dot il>
CC: help at octave dot org
Date: Thu, 12 Jan 2006 03:54:17 +0900

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Shai Ayal wrote:
> Tetsuji "Maverick" Rai wrote:
> Two newbie questions in one email :)  Because the online document (and
> written document) doesn't help me in this part....
> 
> #1. I am trying to write a function file, but octave complains loading
> the function file; e.g. I made a file of sombrero2(n) like (just copied
> "type sombrero")
> ----------sombrero2.oct--------------
> function sombrero2 (n)
> 
>   if (nargin != 1)
>     usage ("sombrero (n)");
>   endif
> 
>   if (n > 1)
>     x = y = linspace (-8, 8, n)';
>     [xx, yy] = meshgrid (x, y);
>     r = sqrt (xx .^ 2 + yy .^ 2) + eps;
>     z = sin (r) ./ r;
> 
>     mesh (x, y, z);
>   else
>     error ("sombrero: number of grid lines must be greater than 1");
>   endif
> 
> endfunction
> ----------------
> 
> and tried "load sombrero2.oct", but octave says:
> 
> octave:4> load "sombrero2.oct"
> error: load: sombrero2.oct: inconsistent number of columns near line 2
> error: load: unable to extract matrix size from file `sombrero2.oct'
> 
> and denies.   However if I copy&paste this function in octave's
> commandline prompt, sombrero2(n) works normally.  What's the difference
> and how can I make octave read it?   octave's document isn't clear on
> this to me...or am I missing anything?
> 
>> The way to do this is to save it as sombrero.m and than just type
> 
>> sombrero
> 
>> at the command line. what you did, "load sombrero.oct" tries to load
>> this file into a matrix as if it were a sequence of numbers.
> 
> 
Thank you!  It worked like a charm (at least it looked like a charm to
me:)).  Then octave looks for *.m file automatically.

- -Tetsuji
- --
Tetsuji 'Maverick' Rai
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