[R] lda source code

[Frank Gibbons]

Wei Geng,

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.
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PhD, Computational Biologist,
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