R help - Apr 2008 - subset and boxplots

R users,
This should be simple, but I cannot figure it out.  I import test.csv, then
create a subset for "brook_dis".  When I plot (week, R) I get a nice
boxplot, but along the x axis, there are weeks a, b, c along with h and nh.

Thank you ahead of time. keith

rm(list=ls())

cond.exp1<-read.csv("condition/test.csv",header=TRUE)

sub<-subset(cond.exp1, Species=="brook_dis")

attach(sub)
plot(week, R)
detach(sub)


 Id Species week  7
 bow  a  10  bow  a  12  bow  a  19  bow  a  23  bow  a  24  bow  a  25  bow
 a  26  bow  a  27  bow  a  28  bow  a  32  bow  a  39  bow  a  7  bow  b
10  bow  b  12  bow  b  19  bow  b  23  bow  b  24  bow  b  25  bow  b  26
 bow  b  27  bow  b  28  bow  b  32  bow  b  39  bow  b  7  bow  c  10  bow
 c  12  bow  c  19  bow  c  23  bow  c  24  bow  c  25  bow  c  26  bow  c
27  bow  c  28  bow  c  32  bow  c  39  bow  c  84  brook_dis  h  85
 brook_dis  h  86  brook_dis  h  87  brook_dis  h  88  brook_dis  h  89
 brook_dis  h  90  brook_dis  h  91  brook_dis  nh  92  brook_dis  nh  93
 brook_dis  nh  94  brook_dis  nh  95  brook_dis  nh  96  brook_dis  nh  97
 brook_dis  nh  98  brook_dis  nh  99  brook_dis  nh





-- 
Keith Cox, Ph.D.
Sitka Sound Science Center
Fisheries Biologist
P.O. Box 464
Sitka, Alaska, 99835

907 752-0563
marlinkcox@gmail.com

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On Tue, 22 Apr 2008 07:55:41 -0800,
"Marlin Keith Cox" <marlinkcox at gmail.com> wrote:
> R users, This should be simple, but I cannot figure it out.  I import
> test.csv, then create a subset for "brook_dis".  When I plot
(week, R)
> I get a nice boxplot, but along the x axis, there are weeks a, b, c
> along with h and nh.
That's because the levels are still there.  To get rid of all them (for
all factors in the data frame):

sub[] <- lapply(sub, "[", drop=TRUE)

after subset()'ing.


-- 
Seb