Re: cov(x,y) = matrix or number?

[Thomas D. Dean]

On 03/11/12 18:54, Jordi Gutiérrez Hermoso wrote:
> On 11 March 2012 21:41, Muhali<address@hidden>  wrote:
> > I just noticed that octave gives
> >
> > O>  X = [1 2; 1 3; 2 5] ;
> > O>  cov(X(:,1), X(:,2))
> > ans =  0.833
> >
> > while matlab returns a matrix
> >
> > M>  cov(X(:,1), X(:,2))
> >
> > ans =
> >
> >     0.3333    0.8333
> >     0.8333    2.3333
>
> You know what to do...
>
>      
> http://hg.savannah.gnu.org/hgweb/octave/file/05635e4c605a/scripts/statistics/base/cov.m#l60
>
> - Jordi G. H.
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://mailman.cae.wisc.edu/listinfo/help-octave

octave-3.6.1:8> X = [1 2; 1 3; 2 5] ;
octave-3.6.1:9> cov(X)
ans =

   0.33333   0.83333
   0.83333   2.33333

Tom Dean