RE: extracting data from matrix

[Allen.Windhorn]

> -----Original Message-----
> From: address@hidden [mailto:help-octave-
> 
> I have the following problem:
> I receive from the simulation matrix like this:
> 
> 1  0,65
> 2  0,49
> 3  0,35
> 4  0,74
> 5  0,62
> 6  0,85
> 7  0,27
> 
> I would like to know how to extract the data from the second column
> corresponding to the following values  from the first column [1, 2, 4,
> 7] in the form of a vector.

octave:8> output = [1  0.65
 2  0.49
 3  0.35
 4  0.74
 5  0.62
 6  0.85
 7  0.27]
output =

   1.00000   0.65000
   2.00000   0.49000
   3.00000   0.35000
   4.00000   0.74000
   5.00000   0.62000
   6.00000   0.85000
   7.00000   0.27000

octave:9> index = [1 2 4 7]
index =

   1   2   4   7

octave:10> output(index,2)
ans =

   0.65000
   0.49000
   0.74000
   0.27000

Hope this is helpful.

Regards,
Allen