[R] Re ading user input (Readline)

[Rolf Turner]

?get

On 29/10/2009, at 11:25 AM, skyjo wrote:

>
> 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
>
> -- 
> View this message in context: http://www.nabble.com/Reading-user- 
> input-%28Readline%29-tp26101738p26101738.html
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>
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