Matt,
Below are three (of the probably many more) possible ways of doing this:
aggregate(1:nrow(df), df, length)
ftable(1 ~ f1 + f2, data=df)
library(plyr)
ddply(df, .(f1,f2), nrow)
Regards,
Jan
On 29-10-2010 15:53, Matthew Pettis wrote:
Hi,
I have a data frame with two factors (well, more, but 2 for simple
consideration), and I want to display the different combinations of
the them that actually occur in the data. In reality, there are too
many of them to do to do a 'table' call and have one col vertical and
one col horizontal (I don't want any of the factors listed
horizontally). Before I try to write a function to do this for me, I
was wondering if there were alternate printing styles for data that
already exist, and if someone could direct me to them? Inclded is a
sample code and 2 possibilities (others welcome for consideration) of
how I want to display some data.
Thanks,
Matt
-----
df<- data.frame(
f1=rep(c("Maj I", "Maj II", "Maj III"), each=3),
f2=c("Minor A", "Minor A", "Minor A", "Minor A", "Minor B", "Minor
B", "Minor B", "Minor C", "Minor C")
)
-----
What I want printed is something like:
-------------------
f1 f2
Maj I Minor A
Maj II Minor A
Minor B
Maj III Minor B
Minor C
-------------------
or
-------------------
f1 f2
Maj I Minor A
Maj II Minor A
Maj II Minor B
Maj III Minor B
Maj III Minor C
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
