Problem with cor (was: Re: mkoctfile problems with Octave 3.4.0, OSX 10.6.7)

[Julien Salort]

Le 21 avr. 2011 à 16:39, Vic Norton a écrit :

> There is a problem with the cor function in this version of Octave. I am 
> attaching illustrative computations using this Octave-3.4.0 and and your 
> previous Octave-3.5.0+.

How does it compare with previous 3.4.0 builds ? (built from the same sources)
ie. does it have something to do with the way I built the release or only with 
some possible changes in cor/cov related M files ?
(the 3.5.0+ release is built using the latest sources from the mercurial tree. 
I have no idea how many things may behave differently.)

If this is related to how I built the package, I have no idea what the problem 
could be...

Any idea ?


> ###
> octave-3.4.0> cor(Ra)
> error: cov: X and Y must have the same number of observations
> error: called from:
> error:   
> /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/statistics/base/cov.m
>  at line 104, column 7
> error:   
> /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/statistics/base/corrcoef.m
>  at line 71, column 7
> error:   
> /Applications/Octave.app/Contents/Resources/share/octave/3.4.0/m/statistics/base/cor.m
>  at line 34, column 10
> octave-3.4.0> cov(Ra)
> ans =
> 
>    1.0196   -1.2736   -1.9540   -1.0084   -1.0189
>   -1.2736    7.1934    9.9016    7.3092    8.1031
>   -1.9540    9.9016   15.1665    9.5205   10.9879
>   -1.0084    7.3092    9.5205    8.9518    9.2089
>   -1.0189    8.1031   10.9879    9.2089   11.5935
> octave-3.4.0> cov(Ra, 1)
> ans =
> 
>    0.99345   -1.24098   -1.90388   -0.98251   -0.99276
>   -1.24098    7.00896    9.64769    7.12176    7.89532
>   -1.90388    9.64769   14.77759    9.27637   10.70612
>   -0.98251    7.12176    9.27637    8.72228    8.97276
>   -0.99276    7.89532   10.70612    8.97276   11.29627
> 
> ###
> octave-3.5.0+> cor(Ra)
> ans =
> 
>   1.00000  -0.47029  -0.49690  -0.33377  -0.29635
>  -0.47029   1.00000   0.94797   0.91085   0.88731
>  -0.49690   0.94797   1.00000   0.81707   0.82863
>  -0.33377   0.91085   0.81707   1.00000   0.90395
>  -0.29635   0.88731   0.82863   0.90395   1.00000
> 
> octave-3.5.0+> cov(Ra)
> ans =
> 
>    1.0196   -1.2736   -1.9540   -1.0084   -1.0189
>   -1.2736    7.1934    9.9016    7.3092    8.1031
>   -1.9540    9.9016   15.1665    9.5205   10.9879
>   -1.0084    7.3092    9.5205    8.9518    9.2089
>   -1.0189    8.1031   10.9879    9.2089   11.5935
> 
> octave-3.5.0+> cov(Ra, 1)
> ans =
> 
>    0.99345   -1.24098   -1.90388   -0.98251   -0.99276
>   -1.24098    7.00896    9.64769    7.12176    7.89532
>   -1.90388    9.64769   14.77759    9.27637   10.70612
>   -0.98251    7.12176    9.27637    8.72228    8.97276
>   -0.99276    7.89532   10.70612    8.97276   11.29627
>