Description Usage Arguments Value
Construct points matrix.
1 | makepointsmatrix(datatable, xvar, yvar, idvar)
|
datatable |
a data.table |
xvar |
column name for x-coordinate |
yvar |
column name for y-coordinate |
idvar |
column name for unique key; currently better to use character (gets stored as row.names) |
a matrix of unique x, y pairs with rownames.
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