Method for extracting 'y values' from an object of class SpatialGridDataFrame
# S3 method for SpatialGridDataFrame
yvals(obj, ...)
an object
additional arguments
the y values
xvals, yvals, zvals, xvals.default, yvals.default, zvals.default, xvals.fromXYZ, yvals.fromXYZ, zvals.fromXYZ, xvals.SpatialGridDataFrame, zvals.SpatialGridDataFrame