Re: [R] Data frame to Matrix by category

Thank you mate! -- View this message in context: http://r.789695.n4.nabble.com/Data-frame-to-Matrix-by-category-tp4669669p4669768.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/

Re: [R] Data frame to Matrix by category

Hello, Maybe something like the following. dat <- read.table(text = " isin dt 1 FR0109970386 2010-01-12 2 FR0109970386 2011-01-12 3 FR0109970386 2012-01-12 4 FR0116114978 2010-01-12 5 FR0116114978 2011-01-12 6 FR0116114978 2012-01-12 ", header = TRUE, stringsAsFactors = FALSE)

[R] Data frame to Matrix by category

Hello Folks, I try to use plyr and reshape 2 to take a data frame of the form: > head(cf_dt) isin dt 1 FR0109970386 2010-01-12 2 FR0109970386 2011-01-12 3 FR0109970386 2012-01-12 4 FR0116114978 2010-01-12 5 FR0116114978 2011-01-12 6 FR0116114978 2012-01-12 to create a matrix o