[R] agrep behavior

[David Winsemius]

Unable to reproduce:

 > agrep("Staatssekretar im  
Bundeskanzleramt","Bundeskanzler",max.distance=.6)
[1] 1
 >
 > agrep("Staatssekretar im  
Bundeskanzleramt","Bundeskanzler",max.distance=.89)
[1] 1
 > agrep("Staatssekretar im  
Bundeskanzleramt","Bundeskanzler",max.distance=.9)
[1] 1
 > agrep("Staatssekretar im  
Bundeskanzleramt","Bundeskanzler",max.distance=.99)
[1] 1


Using integers the threshold is between 20 and 21. Something to do mit  
encodings?

 > sessionInfo()
R version 2.8.1 Patched (2009-01-19 r47650)
i386-apple-darwin9.6.0

locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

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

On Jun 24, 2009, at 2:06 PM, Eduardo Leoni wrote:

> Dear list -
>
> I am a bit puzzled by the behavior of agrep:
>
> The following command finds a match:
>
> agrep("Staatssekretar im  
> Bundeskanzleramt","Bundeskanzler",max.distance=.6)
>
> But if I _increase_ the maximum distance to .9 it fails:
>
> agrep("Staatssekretar im  
> Bundeskanzleramt","Bundeskanzler",max.distance=.9)
>
> What am I missing? (If we use integers in max.distance the threshold
> is between 30 and 31)
>
> -Eduardo


David Winsemius, MD
Heritage Laboratories
West Hartford, CT