I have a 43MB dataframe ( 5 variables) and I'm trying to summarize subsets
of the data.
I've RTFM ( not very clear) and looked at a variety of samples but cant seem
to figure out
how to make these functions work.
A sample of what I want to do would be this:
ids<-seq(1,50)
years<-c(rep(5,10),rep(6,10),rep(7,10),rep(8,20))
data<-c(rep(23.2,7),rep(14.2,17),rep(29.2,6),rep(13.4,10),rep(16.3,5), NA,
rep(40,4))
data2<-c(rep(22.2,5),rep(13.2,8),NA, rep(29.8,16),rep(12.4,10),rep(16.3,5),
rep(38,5))
DF<-data.frame(ids,years,data,data2)
That will give you a dataframe that is a good analog of what I have. i
would like to calculate means
( with NA removed na.rm) for each level of years.
data data2
5 xx. yy.
6 xx yz
7 ... ,,,
8 .. ...
And then things like this:
5-7 : xx yy
8 : xy zz
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