I figured out by reading vignette('sp') and a PBSmapping manual. Thanks.
Takatsugu Kobayashi wrote:
> Hi,
>
> I created a grid of cells of varying sizes using makeGrid() in sp. I
> could calculated the areas of these cells of varying sizes using
> calcArea() and combinePolys() in PBSmapping. I wonder if there is a
> function with which to compute the perimeter length. Or should I convert
> polygons to polylines and use calcLengths()?
>
> Thank you very much.
>
> Taka
>
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