Okay, what about this: ## use expand.grid() to create a data frame of all combinations ## of the element numbers of zz and tt index <- expand.grid(seq_along(zz), seq_along(tt)) index
## use the index to select the element of zz and tt and find their product mapply(`*`, zz[index[, 1]], tt[index[, 2]]) HTH, Josh On Mon, Jun 13, 2011 at 7:12 AM, Carla Moreira <[email protected]> wrote: > Thank you very much. > > I want each element of zz by each element of tt (i.e., every > possible 2-way combination). > > > Carla -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ [email protected] 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.
