Re: 'chol' 2nd output arg: funny output

[Michael Creel]

On Tuesday 22 June 2004 11:31, address@hidden wrote:
> I'm using V2.1.57 Cygwin.
>
> Neither :> help chol
> nor       :>  help -i  chol
> provide any info that 'chol'  returns two outputs.
>
> The latter must be concluded from 'polyfit.m'
> where 'chol' is called with two output
> arguments.
>
> Can anybody give me something info about output B
> of [ R, B ] = chol( A, 0 )    ?
>
> Thanks
> Rolf Fabian   fabian at ansci dot de
>
I was checking this out, and I'm a little surprised by the "Upper Triangular" 
message. What's its purpose? 

octave:1> a = rand(2,2)
a =

  0.81472  0.90579
  0.13548  0.83501

octave:2> a = a'*a
a =

  0.68213  0.85109
  0.85109  1.51770

octave:3> chol(a)
ans =

  0.82591  1.03049
  0.00000  0.67512
Upper Triangular

octave:4>



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