[R] Problem with Snowball & RWeka

[Jean-Pierre Müller]

Dear Forum,

I have also problems Snowball (macos, fresh install of rJava, RWeka, RWekajars, Snowball
from http://cran.ch.r-project.org/bin/macosx/leopard/ ):

> library(Snowball)
> example(SnowballStemmer)

SnwblS> ## Test the supplied vocabulary for the default stemmer ('porter'):
SnwblS> source <- readLines(system.file("words", "porter","voc.txt",
SnwblS+                                 package = "Snowball"))

SnwblS> result <- SnowballStemmer(source)
Erreur dans .jnew(name) : 
  java.lang.InternalError: Can't start the AWT because Java was started on the first thread.  Make sure StartOnFirstThread is not specified in your application's Info.plist or on the command line
Trying to add database driver (JDBC): RmiJdbc.RJDriver - Warning, not in CLASSPATH?
Trying to add database driver (JDBC): jdbc.idbDriver - Warning, not in CLASSPATH?
Trying to add database driver (JDBC): org.gjt.mm.mysql.Driver - Warning, not in CLASSPATH?
Trying to add database driver (JDBC): com.mckoi.JDBCDriver - Warning, not in CLASSPATH?
Trying to add database driver (JDBC): org.hsqldb.jdbcDriver - Warning, not in CLASSPATH?
> example(SnowballStemmer)

SnwblS> ## Test the supplied vocabulary for the default stemmer ('porter'):
SnwblS> source <- readLines(system.file("words", "porter","voc.txt",
SnwblS+                                 package = "Snowball"))

SnwblS> result <- SnowballStemmer(source)

SnwblS> target <- readLines(system.file("words", "porter", "output.txt",
SnwblS+                                 package = "Snowball"))

SnwblS> ## Any differences?
SnwblS> any(result != target)
[1] TRUE
Stemmer 'porter' unknown!
> sessionInfo()
R version 2.12.1 (2010-12-16)
Platform: i386-apple-darwin9.8.0/i386 (32-bit)

locale:
[1] fr_FR/fr_FR/fr_FR/C/fr_FR/fr_FR

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

other attached packages:
[1] Snowball_0.0-7

loaded via a namespace (and not attached):
[1] grid_2.12.1       rJava_0.8-8       RWeka_0.4-3       RWekajars_3.7.3-1 tools_2.12.1     

Any hints?

Thanks!







Le 24 mars 2011 à 12:31, Mike Marchywka a écrit :

> 
> 
> ----------------------------------------
>> Date: Thu, 24 Mar 2011 03:35:31 -0700
>> From: kontakt at alexanderbachmann.de
>> To: r-help at r-project.org
>> Subject: [R] Problem with Snowball & RWeka
>> 
>> Dear Forum,
>> 
>> when I try to use SnowballStemmer() I get the following error message:
>> 
>> "Could not initialize the GenericPropertiesCreator. This exception was
>> produced: java.lang.NullPointerException"
>> 
>> It seems to have something to do with either Snowball or RWeka, however I
>> can't figure out, what to do myself. If you could spend 5 minutes of your
>> valuable time, to help me or give me a hint where to look for, it would be
>> very much appreciated.
>> 
>> Thank you very much.
>> 
> If you only want answers from people who have encountered this exact problem
> before then that's great but you are more likely to get a useful response
> if you include reproducible code and some data to produce the error you have
> seen. Sometimes I investigate these things because they involve a package
> or objective I wanted to look at anyway. It could be that the  only problem is that the OP
> missed something in documentation or had typo etc. 
> 
> In this case, to pursue it from the perspective of debuggin the code, 
> you probably want to find some way to get a stack trace and then find out
> which java variable was null and relate it back to how you invoked it. 
> This likely points to a missing object
> in your call or maybe the installation lacked a dependency as this
> occured during init, but hard to speculate with what you have provided. 
> You could try reinstalling and check for errors.
> 
> 
> 		 	   		  
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

-- 

Jean-Pierre Müller
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