hello, can someone tell me how to generate the means for a data frame
that looks like this? My data frame has many more variables, but I
won't bother you with those; these are the one's that I'm interested in.
Needless to say, z is the variable in which I'm interested. I'd like
to find out the mean score of z for NDP managers, Conservative
managers and Liberal managers and then for a few other configurations.
Ive played around with aggregate, tapply and by, but I can't get it to
work.
Cordially,
Simon Kiss
mydata=data.frame(cbind(x,y,z))
mydata$x=as.factor(sample(c("labourers", "salaried", "managers"),
size=300, replace=TRUE))
mydata$y=as.factor(sample(c("NDP", "Green", "Liberal",
"Conservative"), size=300, replace=TRUE))
mydata$z=as.numeric(sample(1:4, size=300, replace=TRUE))
*********************************
Simon J. Kiss, PhD
Assistant Professor, Wilfrid Laurier University
223 Grand River Hall, 171 Colborne Street
Brantford, Ontario, Canada
N3T 2C9
Cell: +1 519 761 7606
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