Displaying 1 result from an estimated 1 matches for "msg12349".
2011 Jan 17
2
Using summaryBy with weighted data
...y would be a tremendous benefit to R users who regularly work with weighted data, such as myself.
Thanks,
Solomon Messing
www.stanford.edu/~messing
PS I know this basic example can be done using lapply(split(...)) approach referenced here:
http://www.mail-archive.com/r-help@stat.math.ethz.ch/msg12349.html
but for more complex tasks the lapply approach will mean writing a lot of extra code to run everything and then to get things formatted as nicely as summaryBy() was designed to do.
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