Re: [R] Unexpected behavior in recode{car}

[Mulholland, Tom]

require( car )
set.seed(12345)
nn - sample( c( 2, 4 ), size=50, replace=TRUE )
rr - recode( nn, 2='TWO';4='FOUR' )
table( rr, exclude=NULL )
ss - recode( nn, 2='Num2';4='Num4' )  # Doesn't work as expected
table( ss, exclude=NULL )
ss - recode( nn, 2='Num2';4='Num4', TRUE )  #?
table( ss, exclude=NULL )
tt - recode( nn, 2='TWO'; 4='Num4' )
table( tt, exclude=NULL )
uu - recode( nn, 2='Num2'; 4='FOUR' )
table( uu, exclude=NULL )

I looked at the code and found it too difficult to immediately decipher. So 
does making the result a factor cause any real problems?

I noticed that the same response happens with any letterset followed by a number
recode( nn, 2='Num2'; 4='abc5' )

Tom

 -Original Message-
 From: [EMAIL PROTECTED]
 [mailto:[EMAIL PROTECTED] Behalf Of D. Dailey
 Sent: Thursday, 28 July 2005 11:45 AM
 To: r-help@stat.math.ethz.ch
 Subject: [R] Unexpected behavior in recode{car}
 
 
 Thanks to the R creators for such a great statistical system. 
 Thanks to
 the R help list, I have (finally) gotten far enough in R to have a
 question I hope to be worth posting.
 
 I'm using the recode function from John Fox's car package and have
 encountered some unexpected behavior.
 
 Consider the following example:
 
 ## Begin cut-and-paste example
 require( car )
 set.seed(12345)
 nn - sample( c( 2, 4 ), size=50, replace=TRUE )
 rr - recode( nn, 2='TWO';4='FOUR' )
 table( rr, exclude=NULL )
 ss - recode( nn, 2='Num2';4='Num4' )  # Doesn't work as expected
 table( ss, exclude=NULL )
 tt - recode( nn, 2='TWO'; 4='Num4' )
 table( tt, exclude=NULL )
 uu - recode( nn, 2='Num2'; 4='FOUR' )
 table( uu, exclude=NULL )
 ## End cut-and-paste example
 
 All but the recoding to ss work as expected: I get a character vector
 with 23 instances of either FOUR or Num4 and 27 instances of TWO
 or Num2.
 
 But for the ss line, wherein all the strings to be assigned contain a
 digit, the resulting vector contains all NAs. Using str(), I note that
 ss is a numeric vector.
 
 Is there a tidy way (using recode) to recode numeric values into
 character strings, all of which contain a digit? I have a 
 workaround for
 my current project, but it would be nice to be able to use mixed
 alphanumeric strings in this context.
 
 Thanks in advance for any insight you can give into this question.
 
 Using R 2.1.1 (downloaded binary) on Windows XP Pro, car 
 version 1.0-17
 (installed from CRAN via Windows GUI). Complete version information
 below:
 
   version
   _
 platform i386-pc-mingw32
 arch i386
 os   mingw32
 system   i386, mingw32
 status
 major2
 minor1.1
 year 2005
 month06
 day  20
 language R
 
   t(t( installed.packages()['car',] ))
   [,1]
 Package  car
 LibPath  C:/Programs/R/rw2011/library
 Version  1.0-17
 Priority NA
 Bundle   NA
 Contains NA
 Depends  R (= 1.9.0)
 Suggests MASS, nnet, leaps
 Imports  NA
 Built2.1.0
 
 
 I subscribe to the help list in digest form, so would appreciate being
 copied directly in addition to seeing responses sent to the list.
 
 David Dailey
 Shoreline, Washington, USA
 [EMAIL PROTECTED]
 
 __
 R-help@stat.math.ethz.ch mailing list
 https://stat.ethz.ch/mailman/listinfo/r-help
 PLEASE do read the posting guide! 
http://www.R-project.org/posting-guide.html

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Re: [R] Unexpected behavior in recode{car}

[John Fox]

Dear Tom and David,

The source of the problem isn't hard to see if you trace the execution of
recode() via debug(): The test for whether the result can be coerced to
numeric is faulty. I've fixed the bug and will upload a new version of car
to CRAN shortly. In the meantime, you can use 

ss - recode(nn, 2='Num2'; 4='Num4', as.factor=TRUE)

Thanks for bringing this bug to my attention.

John


John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
 

 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Mulholland, Tom
 Sent: Thursday, July 28, 2005 2:01 AM
 To: D. Dailey; r-help@stat.math.ethz.ch
 Subject: Re: [R] Unexpected behavior in recode{car}
 
 require( car )
 set.seed(12345)
 nn - sample( c( 2, 4 ), size=50, replace=TRUE ) rr - 
 recode( nn, 2='TWO';4='FOUR' ) table( rr, exclude=NULL ) ss 
 - recode( nn, 2='Num2';4='Num4' )  # Doesn't work as 
 expected table( ss, exclude=NULL ) ss - recode( nn, 
 2='Num2';4='Num4', TRUE )  #?
 table( ss, exclude=NULL )
 tt - recode( nn, 2='TWO'; 4='Num4' )
 table( tt, exclude=NULL )
 uu - recode( nn, 2='Num2'; 4='FOUR' ) table( uu, exclude=NULL )
 
 I looked at the code and found it too difficult to 
 immediately decipher. So does making the result a factor 
 cause any real problems?
 
 I noticed that the same response happens with any letterset 
 followed by a number recode( nn, 2='Num2'; 4='abc5' )
 
 Tom
 
  -Original Message-
  From: [EMAIL PROTECTED] 
  [mailto:[EMAIL PROTECTED] Behalf Of D. Dailey
  Sent: Thursday, 28 July 2005 11:45 AM
  To: r-help@stat.math.ethz.ch
  Subject: [R] Unexpected behavior in recode{car}
  
  
  Thanks to the R creators for such a great statistical system. 
  Thanks to
  the R help list, I have (finally) gotten far enough in R to have a 
  question I hope to be worth posting.
  
  I'm using the recode function from John Fox's car package and have 
  encountered some unexpected behavior.
  
  Consider the following example:
  
  ## Begin cut-and-paste example
  require( car )
  set.seed(12345)
  nn - sample( c( 2, 4 ), size=50, replace=TRUE ) rr - recode( nn, 
  2='TWO';4='FOUR' ) table( rr, exclude=NULL ) ss - recode( nn, 
  2='Num2';4='Num4' )  # Doesn't work as expected table( ss, 
  exclude=NULL ) tt - recode( nn, 2='TWO'; 4='Num4' ) table( tt, 
  exclude=NULL ) uu - recode( nn, 2='Num2'; 4='FOUR' ) table( uu, 
  exclude=NULL ) ## End cut-and-paste example
  
  All but the recoding to ss work as expected: I get a 
 character vector 
  with 23 instances of either FOUR or Num4 and 27 
 instances of TWO
  or Num2.
  
  But for the ss line, wherein all the strings to be assigned 
 contain a 
  digit, the resulting vector contains all NAs. Using str(), 
 I note that 
  ss is a numeric vector.
  
  Is there a tidy way (using recode) to recode numeric values into 
  character strings, all of which contain a digit? I have a 
 workaround 
  for my current project, but it would be nice to be able to 
 use mixed 
  alphanumeric strings in this context.
  
  Thanks in advance for any insight you can give into this question.
  
  Using R 2.1.1 (downloaded binary) on Windows XP Pro, car version 
  1.0-17 (installed from CRAN via Windows GUI). Complete version 
  information
  below:
  
version
_
  platform i386-pc-mingw32
  arch i386
  os   mingw32
  system   i386, mingw32
  status
  major2
  minor1.1
  year 2005
  month06
  day  20
  language R
  
t(t( installed.packages()['car',] ))
[,1]
  Package  car
  LibPath  C:/Programs/R/rw2011/library
  Version  1.0-17
  Priority NA
  Bundle   NA
  Contains NA
  Depends  R (= 1.9.0)
  Suggests MASS, nnet, leaps
  Imports  NA
  Built2.1.0
  
  
  I subscribe to the help list in digest form, so would 
 appreciate being 
  copied directly in addition to seeing responses sent to the list.
  
  David Dailey
  Shoreline, Washington, USA
  [EMAIL PROTECTED]
  
  __
  R-help@stat.math.ethz.ch mailing list
  https://stat.ethz.ch/mailman/listinfo/r-help
  PLEASE do read the posting guide! 
 http://www.R-project.org/posting-guide.html
 
 __
 R-help@stat.math.ethz.ch mailing list
 https://stat.ethz.ch/mailman/listinfo/r-help
 PLEASE do read the posting guide! 
 http://www.R-project.org/posting-guide.html

__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

[R] Unexpected behavior in recode{car}

[D. Dailey]

Thanks to the R creators for such a great statistical system. Thanks to
the R help list, I have (finally) gotten far enough in R to have a
question I hope to be worth posting.

I'm using the recode function from John Fox's car package and have
encountered some unexpected behavior.

Consider the following example:

## Begin cut-and-paste example
require( car )
set.seed(12345)
nn - sample( c( 2, 4 ), size=50, replace=TRUE )
rr - recode( nn, 2='TWO';4='FOUR' )
table( rr, exclude=NULL )
ss - recode( nn, 2='Num2';4='Num4' )  # Doesn't work as expected
table( ss, exclude=NULL )
tt - recode( nn, 2='TWO'; 4='Num4' )
table( tt, exclude=NULL )
uu - recode( nn, 2='Num2'; 4='FOUR' )
table( uu, exclude=NULL )
## End cut-and-paste example

All but the recoding to ss work as expected: I get a character vector
with 23 instances of either FOUR or Num4 and 27 instances of TWO
or Num2.

But for the ss line, wherein all the strings to be assigned contain a
digit, the resulting vector contains all NAs. Using str(), I note that
ss is a numeric vector.

Is there a tidy way (using recode) to recode numeric values into
character strings, all of which contain a digit? I have a workaround for
my current project, but it would be nice to be able to use mixed
alphanumeric strings in this context.

Thanks in advance for any insight you can give into this question.

Using R 2.1.1 (downloaded binary) on Windows XP Pro, car version 1.0-17
(installed from CRAN via Windows GUI). Complete version information
below:

  version
  _
platform i386-pc-mingw32
arch i386
os   mingw32
system   i386, mingw32
status
major2
minor1.1
year 2005
month06
day  20
language R

  t(t( installed.packages()['car',] ))
  [,1]
Package  car
LibPath  C:/Programs/R/rw2011/library
Version  1.0-17
Priority NA
Bundle   NA
Contains NA
Depends  R (= 1.9.0)
Suggests MASS, nnet, leaps
Imports  NA
Built2.1.0


I subscribe to the help list in digest form, so would appreciate being
copied directly in addition to seeing responses sent to the list.

David Dailey
Shoreline, Washington, USA
[EMAIL PROTECTED]

__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html