I asked the same question about six weeks ago, so let me try to answer it. The source for the entire package 'MASS' is in a single file, I believe (at least this is true on my Linux setup). The exact location of that file you'll have to determine by searching the directory/folder where you installed it. The function 'lda' is implemented entirely in R itself, like much of its functionality. Look at the functions 'lda' and 'predict.lda' in this file for details.
Comments are sparse in most R code, from what I gather, but if you look in "Pattern Recognition and Neural Networks" by Brian Ripley (one of the authors of this package), you'll find a discussion in section 2.4 'Predictive classification' that covers much of what's going on, from what I've been able to glean.
I hope that helps. There are certainly others out there who are more au fait with this than me.
-Frank Gibbons
At 05:47 PM 10/1/2003, you wrote:
Wei Geng wrote:
I am new to R. Trying to find out how lda() {in MASS R1.8.0 Windows} was implemented in R. Does anyone know where to find out lda source code ? Thanks.
Here:
http://cran.r-project.org
Hint: MASS is a *package*. You want to view its *source*.
Same with most other R packages. Or just about anything else you want to know about R.
Cheers
Jason -- Indigo Industrial Controls Ltd. http://www.indigoindustrial.co.nz 64-21-343-545 [EMAIL PROTECTED]
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PhD, Computational Biologist,
Harvard Medical School BCMP/SGM-322, 250 Longwood Ave, Boston MA 02115, USA.
Tel: 617-432-3555 Fax: 617-432-3557 http://llama.med.harvard.edu/~fgibbons
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