[R] lda source code
Frank Gibbons
fgibbons at hms.harvard.edu
Thu Oct 2 00:13:00 CEST 2003
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.
>http://www.indigoindustrial.co.nz
>64-21-343-545
>jasont at indigoindustrial.co.nz
>
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