Re: [R] Data frame to Matrix by category

2013-06-17 Thread AlexPiche
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

2013-06-17 Thread Rui Barradas
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

2013-06-16 Thread AlexPiche
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

Re: [R] Data frame to matrix - revisited

2011-08-02 Thread Dennis Murphy
Hi: Here are a couple of ways. Since your data frame does not contain a 'c' in ID2, we redefine the factor to give it all five levels rather than the observed four: > df <- read.table(textConnection(" + ID1 ID2 Value + a b 1 + b d 1 + c a 2 + c e 1 + d a 1 + e d 2"), header = TRUE) str(df) > str(

Re: [R] Data frame to matrix - revisited

2011-08-02 Thread Jean V Adams
tigo, WI 54409 USA 715-627-4317, ext. 3125 (Office) 715-216-8014 (Cell) 715-623-6773 (FAX) http://www.glsc.usgs.gov (GLSC web site) http://profile.usgs.gov/jvadams (My homepage) jvad...@usgs.gov (E-mail) From: Jagz Bell To: "r-help@R-project.org" Date: 08/02/2011 12:13

[R] Data frame to matrix - revisited

2011-08-02 Thread Jagz Bell
Hi, I've tried to look through all the previous related Threads/posts but can't find a solution to what's probably a simple question.   I have a data frame comprised of three columns e.g.:   ID1 ID2 Value a b 1 b d 1 c a 2 c e 1 d a 1 e d 2   I'd like to convert the data to a matrix i.e.:    a b c

Re: [R] data frame to matrix

2008-01-22 Thread mel
My Coyne a écrit : > I have a data frame and would like to convert it into a matrix, how do I do > that? either use the df for the initialisation values mat = matrix(df, ...) or as.matrix() could do the trick. __ R-help@r-project.org mailing list https:

[R] data frame to matrix

2008-01-22 Thread My Coyne
Hello, I have a data frame and would like to convert it into a matrix, how do I do that? Thanks --My Coyne [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r