For the first case, just extend the vector:
> x<-c(3,4,5)
> x
[1] 3 4 5
> x[5] <- NA
> x
[1] 3 4 5 NA NA
>
the second would use 'which'
On Mon, Jul 7, 2008 at 5:07 PM, Eric Turkheimer <[EMAIL PROTECTED]> wrote:
> I am wondering if it is possible to perform the following two basic
> functions
Eric Turkheimer wrote:
I am wondering if it is possible to perform the following two basic
functions with primitive R functions. I know I could write functions for
either, but it seems as though they are probably built-in somewhere.
1) Fill out a vector to a desired length with missing value
Dear Eric,
Try this:
# First function
f1=function(x,k) c(x,rep(NA,k-length(x)))
x<-c(3,4,5)
f1(x,5)
# Second function
f2=function(x,val){
res=which(x==val,arr.ind=T)
paste(res,collapse=',',sep='')
}
x<-matrix(1:9,ncol=3)
f2(x,2)
HTH,
Jorge
On Mon, Jul 7, 2008 at 5:07 PM, Eric Turkheimer
Here is a solution:
1. c(x, rep(NA, n-length(x)))
2. which(x==2, arr.ind=TRUE)
Cheers
Andy
__
Andy Jaworski
518-1-01
Process Laboratory
3M Corporate Research Laboratory
-
E-mail: [EMAIL PROTECTED]
Tel: (651) 733-6092
Fax: (651) 736-3122
"Eric Turkheimer"
Eric Turkheimer 写道:
I am wondering if it is possible to perform the following two basic
functions with primitive R functions. I know I could write functions for
either, but it seems as though they are probably built-in somewhere.
1) Fill out a vector to a desired length with missing values or
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