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Subject: XploRe: Learning Guide
See XploRe:

Quantlet: smoo12
Description: Computes and plots a local linear regression together with a derivative estimate and the data.
Download: smoo12.xpl

Code:
  library("smoother")
  library("plot")
  setsize(640,480)
;
  motcyc=read("motcyc")
  hh=lpregrot(motcyc)     ; rule-of-thumb bandwidth
  hd=lpderrot(motcyc)     ; rule-of-thumb bandwidth
  mh=lpregest(motcyc,hh)  ; local linear regression
  md=lpderest(motcyc,hd)  ; local quadratic derivative
  mh=setmask(mh,"line","black")
  md=setmask(md,"line","blue","dashed")
  xy=setmask(motcyc,"cross","small","red")
  plot(xy,mh,md)
  setgopt(plotdisplay,1,1,"title","Local Polynomial Estimation")





Subject: XploRe: Learning Guide
See XploRe:

© MD*Tech - Method and Data Technologies, generated on 6.6.2000 .