Hi Derek, On Dec 23, 2007, at 10:59 PM, dxc13 wrote: > > useR's, > > I have used expand.grid() several times and like the results it > gives me. I > am now trying something with it that I have not been able to get to > work. > For any n column matrix I would like to run this function on those > n columns > and store the results. > For example, if my matrix has 1 column then this is just expand.grid > (x = > column1). If my matrix has two columns, then I want expand.grid(x = > column1, y = column2), and so on for any number of columns... >
Does this do what you want (x is the matrix)? do.call(expand.grid, as.data.frame(x)) > In a program I am writing, the user can specify any matrix. Does > anyone > know of a way for R to calculate this based on what the input > matrix is? > e.g. if this user gives a 3 column matrix, I want to be able to > perform > expand.grid() on these 3 columns without having to hard code it b/c > I want > to have this small function embedded in my code and the results > stored as a > variable. > > If this isn't clear, I can try to be more detailed. Thank you for any > thoughts. > > Derek Haris Skiadas Department of Mathematics and Computer Science Hanover College ______________________________________________ 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.
