Mon Feb 24 07:57:57 2020 

polyinterp_test
  R version 3.4.4 (2018-03-15) 
  polyinterp computes the intercept and slope of the line through two points.


  x coordinates:

[1] -1  1  0

  y coordinates:

[1] -2  2 -1

  p <- polyinterp ( x, y )

[1] -1  2  1
  yp <- horner ( xp, p )
   -1  <- horner (  -2 , p )

polyinterp_test
  Normal end of execution.
Mon Feb 24 07:57:57 2020