Re: Scripting question

[Thorsten Meyer]

Hi,

you can write

for i=1:nframes
   plot(x,beul(i+1,:));
end

or even shorter:
 
plot(x,beul(2:nframes,:))

Thorsten



John B. Thoo wrote:

> Hi.  I'm sorry if this is a faq.  I tried to RTFM, but to no avail.
>
> I have an array of data in a file, beul.dat, that I would like to 
> plot.  Typing the following, e.g.,
>
> octave:54> plot (beul (1,:), beul (2,:))
> octave:55> plot (beul (1,:), beul (3,:))
>
> etc., works to give different plots.  But each one's a lot to type.  
> So, I thought I would simplify life by writing a "for" loop:
>
> octave:56> nframes = 10;
> octave:57> x = beul (1,:);
> octave:58> for i = 1:nframes
> > plotframe (i) = eval (sprintf ("plot (x, %s);", beul (i+1,:)));
> > endfor
>
> in the hope that I could simply type "plotframe (1)", "plotframe (2)", 
> etc., to get the different plots.  HOWEVER, I get the following errors:
>
> error: octave_base_value::string_value(): wrong type argument `matrix'
> error: evaluating argument list element number 1
> error: evaluating assignment expression near line 59, column 15
> error: evaluating for command near line 58, column 1
> octave:58>
>
> I only guessed at the syntax to use in the "for" loop based on the 
> recent threads on plotting, but, to be honest, I have absolutely no 
> idea what I'm doing.  Any suggestions?
>
> TIA.
> ---John.
>
>
>
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Octave is freely available under the terms of the GNU GPL.

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