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exams
2007 May 28
1
'trim' must be numeric of length one？
Hi everybody,
When I followed a practice example, I got an error as follows:
########################################################################
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> cc<-read.table('example5_2.dat',header=TRUE)
> cc
EXAM1 EXAM2 EXAM3 EXAM4 EXAM5
1 45 34 23 35 50
2 23 36 66 66 34
3 67 59 72 80 69
4 56 43 31 34 40
5 74 66 57 32 66
> mean(cc)
EXAM1 EXAM2 EXAM3 EXAM4 EXAM5
53.0 47.6 49.8 49.4 51.8
> attach(cc)
> mean(EXAM1,EXAM2,E...