[R] How to calculate Eigen values from LDA object

2010-03-03 Thread Robert Lonsinger
Can anybody explain to me how to calculate Eigen values for linear discriminants, which have been identified in the scaling matrix of a LDA analysis [lda()]. cheers ~~ Robert Lonsinger Wildlife Grad. Research Assistant New Mexico State University Dept. of Fish

[R] Nonparametric alternative to LDA

2010-02-09 Thread Robert Lonsinger
Can anybody recommend a nonparametric alternative to linear discriminant function that may be available as a package in R? Cheers, Rob [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listin

Re: [R] Questions on Mahalanobis Distance

2010-01-30 Thread Robert Lonsinger
everal existing implementations. > rseek.org is a good place to find functions. > > Sarah > > On Fri, Jan 29, 2010 at 9:48 PM, Robert Lonsinger > wrote: >> Hello, >> I am a new R user and trying to learn how to implement the mahalanobis >> function to me

[R] Questions on Mahalanobis Distance

2010-01-29 Thread Robert Lonsinger
Hello, I am a new R user and trying to learn how to implement the mahalanobis function to measure the distance between to 2 population centroids. I have used STATISTICA to calculate these differences, but was hoping to learn to do the analysis in R. I have implemented the code as below, but my re

[R] Equality between covariance matrices?

2010-01-22 Thread Robert Lonsinger
I have conducted a discriminant function analysis with lda() in the MASS Package, and I am interested in testing that the covariance matrices of the groups are equal. Does anybody have any suggestions on how I could test for equality between covariance matrices? Any help would be great. Thank yo

[R] Testing Equality of Covariance Matrices??

2010-01-16 Thread Robert Lonsinger
of covariance matrices, either from the resulting output from the lda model or from the original dataset? Thank you very much. Cheers, Rob -- ~~~~~~ Robert Lonsinger Wildlife Grad. Research Assistant New Mexico State University Dept. of Fish, Wildlife, & Cons. Ecology rob.lo