Re: [R] specific matrix element tranformation

2012-08-17 Thread bantex
Thanks David. I have actually 1 more question. How do I assign a name to the output created by this function? Cheers, B -- View this message in context: http://r.789695.n4.nabble.com/specific-matrix-element-tranformation-tp4640550p4640680.html Sent from the R help mailing list archive at Nabbl

Re: [R] specific matrix element tranformation

2012-08-16 Thread bantex
Hi guys, After a long while I came up with this : set.seed(2) a<-matrix(rnorm(4),ncol=2) abc<-function(a) { b=matrix(NA,nrow=3,ncol=3) b[1,1]=a[1,1]+1 b[1,2]=a[2,1]*a[2,2] b[1,3]=a[2,2]+a[1,1] b[2,1]=a[1,1]-5 b[2,2]=sqrt(a[2,2]) b[2,3]=a[1,1]/a[2,2] b[3,1]=a[2,2]-3 b[3,2]=a[1,1]*(a[1,2]+a[

[R] specific matrix element tranformation

2012-08-16 Thread bantex
Hi guys, I am trying to write a function that allows me to perform specific transformations to each element of a 2 by 2 matrix to generate a 3 by 3 matrix. Input into function-2 by 2 matrix Output from function -3 by 3 matrix For example: # a is my original 2 by 2 matrix #b is my new 3 by 3 m

Re: [R] Column Extraction from matrix

2012-08-16 Thread bantex
Thanks guys for the help. I finally know what to do know :) -- View this message in context: http://r.789695.n4.nabble.com/Column-Extraction-from-matrix-tp4640465p4640482.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-proj

[R] Column Extraction from matrix

2012-08-15 Thread bantex
Hi all, I have a 4 by 100 matrix. I wish to extract each column and make it into a 2 by 2 matrix. I also want to assign names for each 2X2 matrix. For example set.seed(2) a=matrix(rnorm(400),ncol=100) a1=matrix(a[,1],ncol=2) a2=matrix(a[,2],ncol=2) . . . a100=matrix(a[,100],ncol=2) Any sim

Re: [R] Rolling Sample VAR

2012-05-25 Thread bantex
But after looking through rollapply I still don't seem to be able to implement it to my problem. Could you make it more explicit for me to understand? B -- View this message in context: http://r.789695.n4.nabble.com/Rolling-Sample-VAR-tp4631328p4631430.html Sent from the R help mailing list arc

[R] Rolling Sample VAR

2012-05-25 Thread bantex
hi guys, I am using trivariate VAR model to get 10 step ahead orthogonalized impulse response functions. I want to use rolling sample analysis on the coefficients of the irf but I have no idea how to do that. I looked through the forums but I can't seem to find any solutions. Any suggestions wou