nlreg.contours have no proper
print method. They are plotted instead.
See plot.nlreg.contours for details.## S3 method for class 'nlreg.contours':
print(x, alpha = c(0.1, 0.05), drawlabels = FALSE, lwd1 = 1, lwd2 = 1,
lty1 = "solid", lty2 = "solid", cl1 = "blue", cl2 = "red", col = "black",
pch1 = 1, pch2 = 16, cex = 0.5, ...)nlreg.contours.object,
plot.nlreg.contours