I am attempting to replicate some of my experience from SAS in R and assume
there are best methods for using a combination of summary(), subset, and
which() to produce a subset of mean values by categorical or ordinal
factors.
within sas I would write
proc means mean data=dataset;
class factor1 factor2
var variable1 variable2;
RUN;
producing an output with means for each variable by factor groupings as
below:
*factor1 factor2 obs variable mean*
Level A treatmentA 3 variable1 10
variable2 22
treatmentB 3 variable1 12
variable2 30
Level B treatmentA 3 variable1 10
variable2 22
treatmentB 3 variable1 12
variable2 30
What is the best way to go about this in R?
--
Patrick Schmitz
Graduate Student
Plant Biology
1206 West Gregory Drive
RM 1500
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