These functions get the row and/or column number from a cell number of a Raster* object)
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Raster* object (or a SpatialPixels* or SpatialGrid* object)
The colFromCell and similar functions accept a single value, or a vector or list of these values, Cell numbers start at 1 in the upper left corner, and increase from left to right, and then from top to bottom. The last cell number equals the number of cells of the Raster* object.
row of column number(s)
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