Clarification on GPLOT options

[pvareschi]

Re: Neural Network Modelling

What is the difference between using INTERPOLATION=SM<nn> and SPLINES when defining the SYMBOL to be used in Proc GPLOT (see examples at page 1.34 and 2.30 in the course text)?

Asking this because both are referred to as "splines", although the SM<nn> option seems to offer the ability of controlling the degree of smoothing while SPLINES does not: is that the only difference?

[Cynthia_sas · Accepted solution]

Hi:

  The GPLOT documentation https://go.documentation.sas.com/?docsetId=graphref&docsetTarget=n0c0j84n1e2jz9n1bhkn41o3v0d6.htm&do... shows:

and for INTERPOL=SPLINE:

for INTERPOL=SM:

Hope this helps.

Cynthia