[R] Re ading user input (Readline)
skyjo
srjohnson85 at hotmail.com
Wed Oct 28 23:25:29 CET 2009
Hello. I am trying to write an interactive function that asks the user for a
vector of observations. Unfortunately, if a user inputs a vector, R treats
the vector name as a string instead of a variable. Here is an example:
vector.input<-function(){
k<-as.integer(readline("Input number of vectors: "))
obs<-as.integer(readline("Input number of observations per vector
(assumed equal): "))
matrix<-matrix((rep(0,k*obs)),ncol=k)
for(f in 1:k){
matrix[,f]<-as.vector(readline("Input vector of observations: "))
}
matrix
}
v1<-c(1:5)
v2<-c(6:10)
> vector.input()
Input number of vectors: 2
Input number of observations per vector (assumed equal): 5
Input vector of observations: v1
Input vector of observations: v2
[,1] [,2]
[1,] "v1" "v2"
[2,] "v1" "v2"
[3,] "v1" "v2"
[4,] "v1" "v2"
[5,] "v1" "v2"
This resulting matrix is obviously not what I wanted. How can I get the
final matrix to look like:
> matrix
[,1] [,2]
[1,] 1 6
[2,] 2 7
[3,] 3 8
[4,] 4 9
[5,] 5 10
?
Thanks in advance,
Skyler
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