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discid
2012 Dec 29
0
thanks -- Re: syntax for identifying more than one
..."? I'm trying to generate these descriptive stats for each *combination* of "id" and "year."? I could do that in SAS with the following code
proc means mean std n data=test;
? by id year;
? var incidents;
? output out = testsummary
? ? ? mean = mnincidents
? ? ? std = sdincidents
? ? ? n = nincidnets;
proc print data=testsummary;
Again, thanks for responding to the posted question.
Best wishes,
Greg
<quote author='arun kirshna'>
HI,
You could try that in a list if that is okay.
test<-read.table(text="
id year incidents
100? ? 1? ? ? ? 0
101? ?...