eric lee <ericlee100 <at> gmail.com> writes: > How do I get labels onto the output from tapply? I need the labels to merge > the output with another data frame. Thanks. > > eric > > d <- data.frame(cbind(x=1:3, y=1:10)) > a <- with(d, tapply(y, x, sum)) >
By taking the warning seriously. > d <- data.frame(cbind(x=1:3, y=1:10)) Warning message: In cbind(x = 1:3, y = 1:10) : number of rows of result is not a multiple of vector length (arg 1) d <- data.frame(cbind(x=101:110, y=1:10)) a <- with(d, tapply(y, x, sum)) a #101 102 103 104 105 106 107 108 109 110 # 1 2 3 4 5 6 7 8 9 10 Dieter ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
