----- Original Message -----
From: Robin Gruna
To: [EMAIL PROTECTED]
Sent: Sunday, June 20, 2004 5:42 PM
Subject: Evaluating strings as variables
Hello,
I have the following problem: I have a list as follows,
> values <- list(red = 1, yellow = 2, blue = 3)
> values
$red
[1] 1
$yellow
[1] 2
$blue
[1] 3
There is also a vector containing the diffrent "colors" as character strings:
> colors <- c("red", "red", "blue", "yellow", "red", "blue")
> colors
[1] "red" "red" "blue" "yellow" "red" "blue"
Now i can attach the list values to R:
> attach(values)
> red
[1] 1
etc...
Now to my problem: How can I make R in a simple way to evaluate the strings "red",
"blue" etc. as variables, returning their numeric values ?
As result I want to get a vector containing the values of the colors like this one:
> values.colors
[1] 1 1 3 2 1 3
Thanks a lot,
greetings Robin
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