xvals.default: xvals.default function
Description
Default method for extracting 'x values' looks for $X, $x in that order.
Usage
# S3 method for default
xvals(obj, ...)
See Also
xvals, yvals, zvals, yvals.default, zvals.default, xvals.fromXYZ, yvals.fromXYZ, zvals.fromXYZ, xvals.SpatialGridDataFrame, yvals.SpatialGridDataFrame, zvals.SpatialGridDataFrame