From help-octave-request at bevo dot che dot wisc dot edu Fri Oct 24 07:54:55 2003
Subject: FINAL: I would like to do this, but is not supported
From: charo <rbalboa at ua dot es>
To: help-octave at bevo dot che dot wisc dot edu
Date: Fri, 24 Oct 2003 14:53:04 -0400

Hi all,

thanks to all replying to my question.

At the end, I used Geraint's advice as his/her comments fitted best my
needs/thoughts.

Therefore, my script no looks as follows:

Using eval as in (1) I can load a bunch of frames in a binary octave
file, and using eval as in (2) I can create a bunch of matrices with
data from the frames in a regular way.

I didn't want to do it manually because that way is really error-prone
and time consuming.

I really appreciate how people try to help each other and I hope to
contribute to this great software soon. Cooperative programming is
amazingly the best way to work.

Rosario


..........................................................................
#! /usr/local/bin/octave -q

#sript name extractSG:
#      RBC 2003

#echo on all;

numFrames=100000;
if nargin != 2
    Usage= "extractSG fileFrames outputFile",
    return;
endif
eval(sprintf("load %s;",argv{[1,1]})); <-------------- (1)
for i=1:numFrames
   fr = eval(sprintf("seq%03i",i));
   scFr = getSignedSpatialContrast(fr);
   eval(sprintf("sg_seq%03i = scFr;",i)); <------------ (2)
   if mod(i,31)==0
      eval(sprintf("save -b %s sg_seq*;",argv{[2,1]}));
   endif
   eval(sprintf("clear seq%03i",i));
endfor
eval(sprintf("save -b %s sg_seq*;",argv{[2,1]}));
.............................................................



pkienzle at users dot sourceforge dot net wrote:
> On 23 Oct 2003 at 14:19, Geraint Paul Bevan wrote:
> 
> 
>>charo wrote:
>>
>>
>>|>        eval(sprintf("tempGrad(%03i,%03i)",i,j))= tcFr; <---- (2)
>>
>>This should work if you put the "= tcFr" inside the string to be evaluated
>>
>>[*untested*]
>>eval(sprintf("tempGrad(%03i,%03i) = tcFr",i,j));
> 
> 
> Why not assign it directly:  tempGrad(i,j) = tcFr;
> 
> Paul Kienzle
> pkienzle at users dot sf dot net
> 
> 
> 
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