tail(predict(pwidth_ns, iris$Petal.Width[101:150]))
##                 1         2
## [45,] -0.03443883 1.7994615
## [46,]  0.06710765 1.5133026
## [47,]  0.27020061 0.9409848
## [48,]  0.21942737 1.0840642
## [49,]  0.06710765 1.5133026
## [50,]  0.32097386 0.7979053