search for: tp3063668p3063668

...missing values) if there are any NAs. Wouldn't one expect that the 2 forms (data frame vs formula) of aggregate would give the same result? thanks very much david freedman, atlanta -- View this message in context: http://r.789695.n4.nabble.com/data-frame-and-formula-classes-of-aggregate-tp3063668p3063668.html Sent from the R help mailing list archive at Nabble.com.