[R-sig-Geo] gpclib problem with as.polygonal in spatstat ?

[Marcelino de la Cruz]

Hi Alexander,
Try this:

spatstat.options(gpclib=TRUE)
data(letterR)
    m<- as.mask(letterR, dimyx=32)
    p<- as.polygonal(m)

Cheers,

Marcelino


Con fecha 3/12/2010, "Alexandre Villers" <villers.alexandre at gmail.com>
escribió:

>Good afternoon
>
>I'm trying to convert a mask to a polygonal windows with spatstat.
>However, despite, the gpclibPermit() command, I get this error message:
>
>Warning message:
>In as.polygonal(m) :
>
>   Can't convert mask to polygon: gpclib is disabled/unavailable
>
>While trying this
>
>data(letterR)
>    m<- as.mask(letterR, dimyx=32)
>    p<- as.polygonal(m)
>
>>  sessionInfo()
>R version 2.11.1 (2010-05-31)
>i386-pc-mingw32
>
>locale:
>[1] LC_COLLATE=English_United Kingdom.1252  LC_CTYPE=English_United Kingdom.1252    LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C                            LC_TIME=English_United Kingdom.1252
>
>attached base packages:
>[1] stats     graphics  grDevices utils     datasets  methods   base
>
>other attached packages:
>  [1] gdata_2.8.1     gpclib_1.5-1    maptools_0.7-38 lattice_0.18-8  foreign_0.8-40  rgdal_0.6-29    sp_0.9-72       spatstat_1.21-2 deldir_0.0-13   mgcv_1.6-2
>
>loaded via a namespace (and not attached):
>[1] grid_2.11.1        gtools_2.6.2       Matrix_0.999375-39 nlme_3.1-96        tools_2.11.1
>
>
>Thanks for any hint
>
>Alex
>
>
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>
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