On Aug 24, 2009, at 10:59 AM, Inchallah Yarab wrote:
hi,
i want to use the function table to build a table not of frequence
(number of time the vareable is repeated in a list or a data
frame!!) but in function of classes
I don t find a clear explnation in examples of ?table !!!
example
x y z
1 0 100
5 1 1500
6 1 1200
2 2 500
1 1 3500
5 2 2000
8 5 4500
i want to do a table summerizing the number of variable where z is
in [0-1000],],[1000-3000], [> 3000]
thank you very much for your help
See ?cut, which bins a continuous variable.
> DF
x y z
1 1 0 100
2 5 1 1500
3 6 1 1200
4 2 2 500
5 1 1 3500
6 5 2 2000
7 8 5 4500
> table(cut(DF$z, breaks = c(-Inf, 1000, 3000, Inf),
labels = c("0 - 1000", ">1000 - 3000", ">3000")))
0 - 1000 >1000 - 3000 >3000
2 3 2
HTH,
Marc Schwartz
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