[R] specific matrix element tranformation

[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[2,2]) 
b[3,3]=sqrt(a[1,1])/a[1,2] 

return(b=matrix(c(b[1,1],b[1,2],b[1,3],b[2,1],b[2,2],b[2,3],
b[3,1],b[3,2],b[3,3]),ncol=3))
}

How can I improve on it?

Cheers,
B




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