Hey Josh (and everyone), My apologies, let me be more specific. I have two sets of XY coordinates in Cartesian space. I would like to compute a correlation between the two sets. For example, let's say I have two N X 2 matrices, with the first column being the X coordinate, the second column being the Y, and with each row being a new observation. I would like to know the strength the relationship between the two sets of coordinates (matrices). cancor provides two separate correlations, but I want a single value representing the strength of the relationship. Is this more clear?
Chris On May 5, 2012, at 11:44 PM, Joshua Wiley wrote: > Hi Chris, > > As Jeff mentioned, it is hard to tell what you want (correlations > between sets of coordinates could mean many things it seems like to > me), but here is something that perhaps helps: > > ## some data (usually nice if you provide this rather than us having > to make something up) > d1 <- cbind(x <- rnorm(100), y <- rnorm(100)) > d2 <- cbind(x2 = x + rnorm(100), y2 = y + rnorm(100)) > > ## canonical correlation of the two matrices > cancor(d1, d2) > > ## simple correlation matrix of each dataset > cor(d1) > cor(d2) > > Cheers, > > Josh > > On Sat, May 5, 2012 at 5:32 PM, Christopher Kurby <kur...@gvsu.edu> wrote: >> Hello r world, >> >> Does anyone know a function or package that can compute correlations between >> sets of XY coordinates? >> >> Thanks in advance for your help, >> Chris >> >> ______________________________________________ >> 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. > > > > -- > Joshua Wiley > Ph.D. Student, Health Psychology > Programmer Analyst II, Statistical Consulting Group > University of California, Los Angeles > https://joshuawiley.com/ ______________________________________________ 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.
