SAS/INSIGHT User's Guide

Fitting Curves

You can use Fit (Y X) to fit curves when you have one X variable. Curve-fitting helps you identify trends and relationships in two-dimensional data. SAS/INSIGHT software offers both parametric and nonparametric methods to fit curves. You can generate confidence ellipses, fit parametric polynomials with confidence curves, and fit nonparametric curves using spline, kernel, and loess estimators.

Figure 13.1: Fit Window with Several Curves

Parametric Regression Fits

Nonparametric Fits

References

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