[R] SVD for sparse matrices

2007-08-18 Thread Oliver Lyttelton
areNeighbours(i,j) which returns true if the B[i,j]==1, can anyone furnish me with an example of how to do this? I would be extremely grateful With thanks, Oliver Lyttelton (Phd student) PS (I appreciate that I could compute the SVD of t(M) if np but I actively wish to blot out the covariance

[R] Order of terms in a model specification...

2005-11-09 Thread Oliver Lyttelton
Hi, Sorry for this one as its pretty basic but I've taken a look for info and couldn't find any... My question is, does the order of main effect terms in a model specification have any impact on the model R fits or not. (in particular when using lm). ie Can A~X+Y+Z lead to different results

[R] Projection Pursuit

2005-07-11 Thread Oliver Lyttelton
? Thanks in advance, Oliver Lyttelton __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html