Works fine for me. Too bad you didn't include actual data:
> set.seed(42)
> DATA <- data.frame(UnitName_1=factor(sample(c("lake", "pond",
"river"),
+ 15, replace=TRUE)), Var=sample.int(100, 15))
> DATA
UnitName_1 Var
1 river 95
2 river 97
3 lake 12
4 river 47
5 pond 54
6 pond 86
7 river 14
8 lake 92
9 pond 88
10 river 8
11 pond 99
12 river 35
13 river 80
14 lake 39
15 pond 72
> toBeRemoved1 <- which(DATA$UnitName_1=="lake")
> toBeRemoved1
[1] 3 8 14
> DATA <- DATA[-toBeRemoved1,]
> DATA
UnitName_1 Var
1 river 95
2 river 97
4 river 47
5 pond 54
6 pond 86
7 river 14
9 pond 88
10 river 8
11 pond 99
12 river 35
13 river 80
15 pond 72
-------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: r-help-boun...@r-project.org
[mailto:r-help-boun...@r-project.org] On Behalf Of Shane Carey
Sent: Thursday, June 13, 2013 7:03 AM
To: r-help@r-project.org
Subject: [R] Remove levels
I have a dataframe consisting of factors in one column. Im trying to
remove
certain levels using the following code:
toBeRemoved1<-which(DATA$UnitName_1=="lake")
DATA<-DATA[-toBeRemoved1,]
However it will not remove the level "lake"
In the past this worked for me, but its not working now. Any help
appreciated.
Thanks
--
Shane
[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
