Re: Scripting question

[John B. Thoo]

Thorsten---

On Mar 26, 2004, at 12:26 AM, Thorsten Meyer wrote:

> you can write
>
> for i=1:nframes
>    plot(x,beul(i+1,:));
> end

Ooh ... this one _animates_ the solution in gnuplot.  Neat.


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

And this one plots all the frames as if with 'hold on'.

I like both of your suggestions---thanks!---so I'm going to save them; 
however, I'm still looking for a way to plot a particular frame with 
something like

   plotframe (3)

say, to plot only frame 3.

Cheers.
---John.


> 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.



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------