Scatter Twoway with median spline, fractional polynomial ﬁt , median band, and lowess

This example includes a median spline (mspline), fractional polynomial ﬁt (fpfit), median band (mband), and lowess (lowess).

Step 1: Downlaod allstates.dta

https://drive.google.com/open?id=1olWQFYNKLFfLYgFZe5IY3VNx053kXbC9

Step 2: open allstates.dta

Step 3: type command

twoway (scatter propval100 popden) (mspline propval100 popden)(fpfit propval100 popden) (mband propval100 popden)(lowess propval100 popden)

$Scatter Twoway with median spline, fractional polynomial ﬁt , median band, and lowess.jpg$

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