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out_gr1
2011 Apr 30
1
More flexible aggregate / eval
...nction(x) round(prop.table(x) * 100, 1) ) )
op2 <- xtabs(l_pct ~ eval(as.name(xvar)) + ids + time, data = d2)
fop2 <- ftable(op2, row.vars=c(1,3))
out <- list(d2, fop2)
return(out)
}
( out_gr1 <- myfun(df, "group1") )
( out_gr2 <- myfun(df, "group2") )
( out_gr3 <- myfun(df, "group3") )
This seems to work ok, but I am not really familiar with 'as.formula',
'eval' and 'as.name'. So I would like to know, if my solution is ok or
if there are maybe better ways to solve this task.
Thanks for any help!!
Patrick