Displaying 2 results from an estimated 2 matches for "vanron".
2006 Nov 23
1
Partial derivatives of a matrix with respect to a single element
...9;ve read and used the derivative functions in R, and
could (probably) write a lengthy routine to duplicate this solution, but
if there's a shortcut, I have no delusions about my own laziness and
will greatly appreciate your input.
R. VanNimwegen
Kansas State University
Division of Biology
vanron at ksu.edu
2007 May 06
7
A function for raising a matrix to a power?
Hi,
Is there a function for raising a matrix to a power? For example if you like to compute A%*%A%*%A, is there an abbreviation similar to A^3?
Atte Tenkanen
> A=rbind(c(1,1),c(-1,-2))
> A
[,1] [,2]
[1,] 1 1
[2,] -1 -2
> A^3
[,1] [,2]
[1,] 1 1
[2,] -1 -8
But:
> A%*%A%*%A
[,1] [,2]
[1,] 1 2
[2,] -2 -5