Da: Paul Gilbert [pgilbert...@gmail.com]
Inviato: martedì 15 dicembre 2015 15.28
A: Stefano Sofia
Cc: r-help@r-project.org; Fox, John; peter dalgaard
Oggetto: Re: [R] matrix which results singular but at the same time positive
definite
Stefano
I think in other response to in this thread you got
Stefano
I think in other response to in this thread you got the answer to the
question you asked, but you may be asking the wrong question. I'm not
familiar with the specific papers you mention and you have not provided
enough detail about what you are doing, so I am guessing a bit. The term
-project.org
Oggetto: RE: [R] matrix which results singular but at the same time positive
definite
Dear Peter,
> -Original Message-
> From: peter dalgaard [mailto:pda...@gmail.com]
> Sent: Thursday, December 10, 2015 11:09 AM
> To: Stefano Sofia
> Cc: Fox, John; r-help@r-projec
Decrease the "tol" parameter specified into the "is.non.singular.matrix() call,
for example as:
m <- matrix(c( 1.904255e-12, -1.904255e-12, -8.238960e-13, -1.240294e-12,
-1.904255e-12, 3.637979e-12, 1.364242e-12, 1.818989e-12,
-8.238960e-13, 1.364242e-12,
Dear list users,
through the "matrixcalc" package I am performing some checks of variance
matrices (which must be positive definite).
In this example, it happens that the matrix A here reported is singular but
positive definite. Is it possible?
[,1] [,2] [,3]
On 10/12/15 23:08, Stefano Sofia wrote:
Dear list users,
through the "matrixcalc" package I am performing some checks of variance
matrices (which must be positive definite).
In this example, it happens that the matrix A here reported is singular but
positive definite. Is it possible?
Master University
Hamilton, Ontario
Canada L8S 4M4
Web: socserv.mcmaster.ca/jfox
> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Stefano Sofia
> Sent: December 10, 2015 5:08 AM
> To: r-help@r-project.org
> Subject: [R] matrix w
--
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Stefano Sofia
> Sent: December 10, 2015 5:08 AM
> To: r-help@r-project.org
> Subject: [R] matrix which results singular but at the same time positive
> definite
>
> Dear list users,
> through the "ma
> Best,
> John
>
> -
> John Fox, Professor
> McMaster University
> Hamilton, Ontario
> Canada L8S 4M4
> Web: socserv.mcmaster.ca/jfox
>
>
>
>
> > -Original Message-----
> > From: R-help [mailto:r-help-boun...@r-project.org] On Be
; -
> John Fox, Professor
> McMaster University
> Hamilton, Ontario
> Canada L8S 4M4
> Web: socserv.mcmaster.ca/jfox
>
>
>
>
>> -Original Message-----
>> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Stefa
Dear Peter,
> -Original Message-
> From: peter dalgaard [mailto:pda...@gmail.com]
> Sent: Thursday, December 10, 2015 11:09 AM
> To: Stefano Sofia
> Cc: Fox, John; r-help@r-project.org
> Subject: Re: [R] matrix which results singular but at the same time
> positiv
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