On Apr 21, 2009, at 7:52 PM, Gundala Viswanath wrote:
Dear all,
I have a data frame that looks like this:
dat
V1 V2 V3
1 0.000 2 554889
2 2.001 0 9978
3 0.342 3 5263
4 123.000 0 3209
5 0.004 0 2434
I want to get a subset of that data frame where
the entry in V1 has (x.000) as its decimal.
yielding
wanted_dat
V1 V2 V3
1 0.000 2 554889
2 123.000 0 3209
What's the way to do it in R?
At least two possibilities:
# See if the truncated value == value
# See ?trunc
> subset(dat, trunc(V1) == V1)
V1 V2 V3
1 0 2 554889
4 123 0 3209
# See if V1 mod 1 == 0
> subset(dat, V1 %% 1 == 0)
V1 V2 V3
1 0 2 554889
4 123 0 3209
See ?subset as well.
HTH,
Marc Schwartz
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