extractPolyData function

Extract PolyData from a PolySet

Extract PolyData from a PolySet . Columns for the PolyData include those other than PID, SID, POS, oldPOS, X, and Y.

extractPolyData (polys)

Arguments

• polys: PolySet to use.

Details

This function identifies the PolySet 's extra columns and determines if those columns contain unique values for each (PID, SID). Where they do, the (PID, SID) will appear in the PolyData output with that unique value. Where they do not, the extra column will contain NAs for that (PID, SID).

Returns

PolyData with columns PID, SID, and any extra columns.

Author(s)

Nicholas M. Boers, Staff Software Engineer

Jobber, Edmonton AB

Last modified Rd: 2013-04-10

See Also

makeProps, PolyData , PolySet .

Examples

local(envir=.PBSmapEnv,expr={
  #--- create a PolySet with an extra column
  polys <- data.frame(PID = c(rep(1, 10), rep(2, 10)),
    POS = c(1:10, 1:10),
    X = c(rep(1, 10), rep(1, 10)),
    Y = c(rep(1, 10), rep(1, 10)),
    colour = (c(rep("green", 10), rep("red", 10))))
  #--- extract the PolyData
  print(extractPolyData(polys))
})