locfit or preplot.locfit
objects.## S3 method for class 'locfit.2d':
plot(x, type="contour", main, xlab, ylab, zlab=x$yname, ...)preplot.locfit object."contour", "persp", or "image".type="persp", the label for the z-axis.contour, persp or
image functions.locfit, plot.locfit, preplot.locfit