R help - Nov 2009 - Error running lda example from Help File (MASS library )

Hello all,

I'm trying to run lda() from the MASS library but the Help example generates
the
following error:


#Code from example in lda Help file



# Resulting Error
>Error in if (targetlist[i] == stringname) { : argument is of length zero

My Current R Installation:
MacOSX: 10.5.8
R: 2.10.0




-- 
Gregory Riddick, PhD.
CRTA Research Fellow

National Institutes of Health
National Cancer Institute, Neuro-Oncology Branch
http://home.ccr.cancer.gov/nob/

37 Convent Drive
Building 37, Room 1142
Bethesda, MD 20892-8202

Phone: 301-443-2490
Fax: 240-396-5920

	[[alternative HTML version deleted]]

I don't run into any problem when runing examples from lda help file.
> sessionInfo()
R version 2.10.0 Patched (2009-11-09 r50375)
i386-pc-mingw32

locale:
[1] LC_COLLATE=Chinese_People's Republic of China.936
[2] LC_CTYPE=Chinese_People's Republic of China.936
[3] LC_MONETARY=Chinese_People's Republic of China.936
[4] LC_NUMERIC=C
[5] LC_TIME=Chinese_People's Republic of China.936

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] MASS_7.3-3     ASRR_0.0-1     ASAtable_0.0-1 QCA3_0.0-3

loaded via a namespace (and not attached):
[1] car_1.2-16   tools_2.10.0



2009/11/15 Greg Riddick <riddickgp at
mail.nih.gov>:
> Hello all,
>
> I'm trying to run lda() from the MASS library but the Help example
generates
> the
> following error:
>
>
> #Code from example in lda Help file
>
>
>
> # Resulting Error
>
>>Error in if (targetlist[i] == stringname) { : argument is of length zero
>
>
> My Current R Installation:
> MacOSX: 10.5.8
> R: 2.10.0
>
>
>
>
> --
> Gregory Riddick, PhD.
> CRTA Research Fellow
>
> National Institutes of Health
> National Cancer Institute, Neuro-Oncology Branch
> http://home.ccr.cancer.gov/nob/
>
> 37 Convent Drive
> Building 37, Room 1142
> Bethesda, MD 20892-8202
>
> Phone: 301-443-2490
> Fax: 240-396-5920
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Wincent Ronggui HUANG
Doctoral Candidate
Dept of Public and Social Administration
City University of Hong Kong
http://asrr.r-forge.r-project.org/rghuang.html

On Nov 14, 2009, at 7:02 PM, Greg Riddick wrote:
> Hello all,
>
> I'm trying to run lda() from the MASS library but the Help example  
> generates
> the following error:
>
> #Code from example in lda Help file
> <no code included>
> # Resulting Error
>
>> Error in if (targetlist[i] == stringname) { : argument is of length  
>> zero
Cannot reproduce on setup possibly similar to yours:

 > sessionInfo()
R version 2.10.0 Patched (2009-10-29 r50258)
x86_64-apple-darwin9.8.0

locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets   
methods   base

other attached packages:
[1] MASS_7.3-3      plyr_0.1.9      survey_3.18     Design_2.3-0     
Hmisc_3.7-0
[6] survival_2.35-7 lattice_0.17-26

loaded via a namespace (and not attached):
[1] cluster_1.12.1 grid_2.10.0    tools_2.10.0

>
> My Current R Installation:
> MacOSX: 10.5.8
> R: 2.10.0
What is your sessionInfo(), requested in Posting Guide.
>
> -- 
> Gregory Riddick, PhD.
> CRTA Research Fellow
>
> National Institutes of Health
> National Cancer Institute, Neuro-Oncology Branch
> http://home.ccr.cancer.gov/nob/
>
> 37 Convent Drive
> Building 37, Room 1142
> Bethesda, MD 20892-8202
-- 
David Winsemius, MD
Heritage Laboratories
West Hartford, CT

The actual code for the lda example is below.  If anyone can reproduce the
error,
let me know.  Thanks.


library(MASS)

Iris <- data.frame(rbind(iris3[,,1], iris3[,,2], iris3[,,3]),
                   Sp = rep(c("s","c","v"),
rep(50,3)))
train <- sample(1:150, 75)
table(Iris$Sp[train])
z <- lda(Sp ~ ., Iris, prior = c(1,1,1)/3, subset = train)


>Error in if (targetlist[i] == stringname) { : argument is of length zero
System: MacOSX 10.5.8
R:  2.10.0


-- 
Gregory Riddick, PhD.
CRTA Research Fellow

National Institutes of Health
National Cancer Institute, Neuro-Oncology Branch
http://home.ccr.cancer.gov/nob/

37 Convent Drive
Building 37, Room 1142
Bethesda, MD 20892-8202

Phone: 301-443-2490
Fax: 240-396-5920

	[[alternative HTML version deleted]]