[R] lda in R vs S

[Marc R. Feldesman]

This file was dumped directly from S-Plus.  This is what I get if I use the
levels() function from within R.  Nothing untoward there that I can see.

levels(sarich.na[,3])
 [1] "AINU"     "ANDAMAN"  "ANYANG"   "ARIKARA"  "ATAYAL"   "AUSTRALI"
 [7] "BERG"     "BURIAT"   "BUSHMAN"  "DOGON"    "EASTER I" "EGYPT"   
[13] "ESKIMO"   "GUAM"     "HAINAN"   "MOKAPU"   "MORIORI"  "N JAPAN" 
[19] "N MAORI"  "NORSE"    "PERU"     "PHILLIPI" "S JAPAN"  "S MAORI" 
[25] "SANTA CR" "TASMANIA" "TEITA"    "TOLAI"    "ZALAVAR"  "ZULU" 


At 01:45 AM 5/7/1999 +0200, Peter Dalgaard BSA wrote:
>"Marc R. Feldesman" <feldesmanm at pdx.edu> writes:
>
>> 
>> No actually I *had* a factor.
>> 
>> is.factor(sarich.na[,3])
>> [1] TRUE
>> > 
>> 
>> This is why I was perplexed by the behavior after Brian suggested the
>> various alternatives.
>
>Strange things may happen if the "factor" class gets set by unorthodox
>means. E.g.:
>
>> d<-letters[1:3]
>> class(d)<-"factor"
>> d
>NULL
>Levels:   
>> unclass(d)
>[1] "a" "b" "c"
>> is.factor(d)   
>[1] TRUE
>> factor(d)
>Error: invalid labels argument in "factor"
>
>Another possibility is that it is the indexing in itself that is
>confusing the model formula parsing code. Perhaps it may work to put
>in I(sarich.na[,3])?
>
>-- 
>   O__  ---- Peter Dalgaard             Blegdamsvej 3  
>  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
> (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
>~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

Dr. Marc R. Feldesman
email:  feldesmanm at pdx.edu
email:  feldesman at ibm.net
fax:    503-725-3905

"Math is hard.  Let's go to the mall"  Barbie

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