>> interpolates

year =

        2011


pop_lagrange =

  285.9566


pop_spline =

  311.1920


year =

        2018


pop_lagrange =

 -616.7460


pop_spline =

  298.2019

>> interpolatePL

nd =

     5

>> interpolatePL

nd =

     6

>> interpolatePL

nd =

     8

>> interpolatePL2
>> interpolateCS

nd =

     3

>> interpolateCS

nd =

     4

>> interpolateCS

nd =

     5

>> interpolateCS

nd =

     7

>> interpolateCS

nd =

    13

>>