Significance Test for Loess vs. LM

Description

Calculates an F test to evaluate significant differences between a LOESS model and a parametric alternative estimated with lm

Usage

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testLoess(lmobj, loessobj, alpha=.05)

Arguments

lmobj

An object of class lm.

loessobj

An object of class loess.

alpha

Desired Type I error rate of test.

Value

Printed output describing the results of the test.

Author(s)

Dave Armstrong (UW-Milwaukee, Department of Political Science)

Examples

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library(car)
linmod <- lm(prestige ~ income, data=Prestige)
lomod <- loess(prestige ~ income, data=Prestige)
testLoess(linmod, lomod)

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