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2010 Aug 26
1
Passing arguments between S4 methods fails within a function:bug? example with raster package.
...Values", signature(object='RasterLayer', xy='matrix'),
function(object, xy, method='simple', buffer=NULL, fun=NULL, na.rm=TRUE) {
if (dim(xy)[2] != 2) {
stop('xy has wrong dimensions; it should have 2 columns' )
}
if (! is.null(buffer)) {
return( .xyvBuf(object, xy, buffer, fun, na.rm=na.rm) )
}
if (method=='bilinear') {
return(.bilinearValue(object, xy))
} else if (method=='simple') {
cells <- cellFromXY(object, xy)
return(.readCells(object, cells))
} else {
stop('invalid method argument. Should be simpl...