hi, i'm tring to do the various example on :

http://skagit.meas.ncsu.edu/~helena/publwork/GRASSnews_vol3.pdf

  until  to pag.14
i have not problems
  but at :

Using the spgrass6 package with
vector data...

at the  line :
   > streams <- shp2SLDF(res, proj4string = p4s)

i've this error message :

Errore: non trovo la funzione "shp2SLDF"

??? why ???
i've read the maptools pdf but i have not find the    shp2SLDF   
command :-(

can you hel me ?
thanks!
Massimo.


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