polarloess

Polar loess smoothing for variables X and Y. This does a bivariate smooth.

Input Arguments:

• X and Y are vectors containing the observed bivariate data.
• ALPHA is the smoothing parameter.
• DEG is is the degree of the local fit (1 or 2)..

Output Arguments:

• XHAT and YHAT are the fitted values that can be used to superimpose a curve over the scatterplot.

Synopsis

[XHAT, YHAT] = POLARLOESS(X,Y,ALPHA,DEG)

References:

Cleveland, W. S. and Robert McGill. 1984. “The many faces of a scatterplot,” Journal of the American Statistical Association, 79:807-822.