cat("input x: ")
x <- readLines(con="stdin", 1)
cat(x, "\n")
User input in R
-
28-06-2023 - |
문제
I am trying to run an R script, using Rscript
in Windows command prompt and ask for user's input.
So far, i have found answers on how to implement something similar in R's interactive shell. readline()
or scan()
doesn't seem to work for the command prompt.
Examples:
I have a polynomial y=cX
where X
can take more than one values X1
,X2
,X3
and so on. C
variable is know, so what i need in order to calculate the value of y
is to ask the user for the Xi
values and store them somewhere inside my script.
The script bellow does nothing.
UIinput <- function(){
#Ask for user input
x <- readline(prompt = "Enter X1 value: ")
#Return
return(x)
}
The second example below just prompts the message and then ends.
FUN <- function(x) {
if (missing(x)) {
message("Uhh you forgot to eneter x...\nPlease enter it now.")
x <- readLines(n = 1)
}
x
}
FUN()
Console output:
Uhh you forgot to eneter x...
Please enter it now.
character(0)
Any suggestions?
Thanks in advance
해결책
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