[R] left eigenvector

[Spencer Graves]

      What about the following: 

 > A <- array(1:4, dim=c(2,2))
 > leftA <- eigen(t(A))
 > t(leftA$vectors)
           [,1]       [,2]
[1,] -0.4159736 -0.9093767
[2,] -0.8245648  0.5657675

      hope this helps.  spencer graves

Tom Blackwell wrote:

>Federico  -
>
>If a matrix is symmetric, its left and right eigenvectors are identical.
>If a matrix is not symmetric, its left eigenvector is the right eigenvector
>of its transpose.  However, without checking, I don't recall which R functions
>will return the correct right eigenvectors for a non-symmetric matrix.
>
>-  best  -  tom blackwell  -  u michigan medical school  -  ann arbor  -
>
>On Thu, 12 Feb 2004, Federico Calboli wrote:
>
>  
>
>>Dear All,
>>
>>how do I compute the left eigenvector of a matrix? I gather that "eigen"
>>computes the right eigenvectors...
>>
>>Regards,
>>
>>Federico Calboli
>>--
>>
>>
>>
>>=================================
>>
>>Federico C. F. Calboli
>>
>>PLEASE NOTE NEW ADDRESS
>>
>>Dipartimento di Biologia
>>Via Selmi 3
>>40126 Bologna
>>Italy
>>
>>tel (+39) 051 209 4187
>>fax (+39) 051 251 208
>>
>>f.calboli at ucl.ac.uk
>>
>>______________________________________________
>>R-help at stat.math.ethz.ch mailing list
>>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>>
>>    
>>
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>  
>