I am looking for a way to generate a data matrix that contains all possible response patterns for 10 binary items. This should produce a matrix with 10 rows (representing 10 items) and 1024 columns (representing 2^10 possible response patterns). Does anyone know of code that would produce such a matrix? Thanks! Sarah Depaoli
Daniel Folkinshteyn
2008-Jun-26 18:39 UTC
[R] Data matrix of all possible response patterns
this is probably a cludge, and there may be a "neater" way to do this, but... here's one: > a = 0:1 > for (i in 1:9){ a= merge(unname(a), 0:1) } > a = t(a) after the for loop, 'a' will contain a 1024 row by 10 col dataframe. putting it through a transpose, gives you the 10 rows by 1024 cols matrix. on 06/26/2008 02:18 PM SARAH A DEPAOLI said the following:> I am looking for a way to generate a data matrix that contains all possible response patterns for 10 binary items. This should produce a matrix with 10 rows (representing 10 items) and 1024 columns (representing 2^10 possible response patterns). Does anyone know of code that would produce such a matrix? > > Thanks! > Sarah Depaoli > > ______________________________________________ > R-help at 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. >
Henrique Dallazuanna
2008-Jun-26 18:55 UTC
[R] Data matrix of all possible response patterns
Try this also: t(expand.grid(rep(list(0:1), 10))) On Thu, Jun 26, 2008 at 3:18 PM, SARAH A DEPAOLI <depaoli@wisc.edu> wrote:> I am looking for a way to generate a data matrix that contains all possible > response patterns for 10 binary items. This should produce a matrix with 10 > rows (representing 10 items) and 1024 columns (representing 2^10 possible > response patterns). Does anyone know of code that would produce such a > matrix? > > Thanks! > Sarah Depaoli > > ______________________________________________ > 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. >-- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[alternative HTML version deleted]]