Hi,
Try:
x[x$Species%in%names(sp)[1:2],]
A.K.
On Saturday, February 8, 2014 10:21 PM, Yuanzhi Li <Yuanzhi.Li at
USherbrooke.ca> wrote:
Hi, everyone
I met a small problem when I want take a subset from a data frame. The
data frame(x) looks like the followings(10 species with 3 measured
traits):
Species? ? trait1? ? trait2? ? trait3
sp1
sp1
...
sp2
sp2
...
sp10
sp10
...
It would be easy if we want trait values for most abundant species, we
can do that with the following codes
sp<-table(x$Species)
x[x$Species==names(sp)[1],]
but why it doesn't work if we want to select traits values for more than
one species(most abundant two species) with similar codes
x[x$Species==names(sp)[1:2],]
And there must be other solutions for this problem. Looking forward for
your help.
Thanks in advance!
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