I am a new R user and am beginning to employ function creation in my
statistical work. I am running into a problem when I want to pass on a
character (text) to the function as an argument. I have a simple example below
to demonstrate this problem. I cannot seem to find a fix in my R book or in
the blog posts. I'm sure this has been covered before but my newbie status
means I lack the R vocabulary to even search for this problem (I've tried for a
few days to no avail). Someone has already attempted to explain this to me. I
learn best by seeing. Could someone rewrite my code so that the function
works. The function is very simple as is the data set so it should be pretty
easy for an experienced R user to correct. The problem is that R doesn't
transfer the "blue" subgroup from the argument to the function. I am excited
with the potential of R and look forward to your help.
I am a Windows user running R 2.12.2
CODE for TEST FUNCTION
> TEST<-function(DV,IV,group1) {
+ g1<-DV[IV=="group1"]
+ p<-mean(g1)
+ list(g1,p)
+ }
R's OUTPUT
> TEST(frequency,color,blue)
[[1]]
integer(0)
[[2]]
[1] NaN
The DATA FRAME
TEST<-read.table("TEST.csv", header=TRUE, sep=",",na.strings="999")
> attach(TEST)
color frequency
1 blue 3
2 blue 4
3 blue 3
4 green 5
5 green 2
6 green 4
7 green 5
8 green 1
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