Dear list,
I cannot figure out why, after sub-setting my data, that particular item
which I don't want to plot is still in the newly created subset (please
see example below). R somehow remembers what was in the original data
set. A work around is exporting and importing the new subset. Then it's
all fine; but I don't like this idea and was wondering what am I missing
here?
Thanks!
Stefan
P.S. I am using R 2.13.2 for Mac.
> dat<-read.csv("~/MyFiles/data.csv")
> class(dat$treat)
[1] "factor"
> dat
treat yield
1 cont 98.7
2 cont 97.2
3 cont 96.1
4 cont 98.1
5 10 103.0
6 10 101.3
7 10 102.1
8 10 101.9
9 30 121.1
10 30 123.1
11 30 119.7
12 30 118.9
13 60 109.9
14 60 110.1
15 60 113.1
16 60 112.3
> plot(dat$treat,dat$yield)
> dat.sub<-dat[which(dat$treat!='cont')]
> class(dat.sub$treat)
[1] "factor"
> dat.sub
treat yield
5 10 103.0
6 10 101.3
7 10 102.1
8 10 101.9
9 30 121.1
10 30 123.1
11 30 119.7
12 30 118.9
13 60 109.9
14 60 110.1
15 60 113.1
16 60 112.3
> plot(dat.sub$treat,dat.sub$yield)
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