On Aug 30, 2012, at 4:02 AM, andyspeak wrote:
Hello
Thankyou for the help.
kruskal.test(Temp, Roof) is simple but just returns one result for
the
whole temperature dataset organised by roof.
I want to compare the Temp data for each Roof in each Month. So
because i
have temperature data on the three roofs for 16 different months
then i want
16 separate kruskal.test results.,
lapply( split(dfrm, dfrm$Month), function(xfrm) {
kruskal.test(xfrm[["Temp"]], xfrm[["Roof"]] }
Notice that I used an assumed name for the dataframe. You have
apparently been following unwise advice to use attach. You would be
advised to disregard that advice.
--
David Winsemius, MD
Alameda, CA, USA
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