[R] problem with function "polygon"

[Eric Elguero]

Hi all,

I'm trying to use the polygon function from
the graphics package, and get this error
message :

 > polygon(x=c(1,2,3,1),y=c(1,4,5,1))
Error in .Internal(polygon(xy$x, xy$y, col, border, lty, ...)) :
   there is no .Internal function 'polygon'

That annoys me because polygon is actually
called by several other functions I need.

my R version:

R version 3.1.2 (2014-10-31) -- "Pumpkin Helmet"
Copyright (C) 2014 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

and I just updated everything.

e.e.