LOCFIT: R and S-Plus Help

These help pages were initially prepared for Locfit in R. For S and S-Plus users, the data() statements in many examples are unnecessary.

Locfit Fitting Functions

density.lf	Density estimation using Locfit
fitted.locfit	Fitted values for a `"locfit"' object.
hatmatrix	Weight diagrams and the hat matrix for a local regression model.
kappa0	Critical Values for Simultaneous Confidence Bands.
locfit.censor	Censored Local Regression
locfit.quasi	Local Quasi-Likelihood with global reweighting.
locfit.raw	Local Regression, Likelihood and Density Estimation.
locfit	Local Regression, Likelihood and Density Estimation.
locfit.robust	Robust Local Regression
scb	Simultaneous Confidence Bands
smooth.lf	Local Regression, Likelihood and Density Estimation.
spence.15	Spencer's 15 point graduation rule.
spence.21	Spencer's 21 point graduation rule.

Locfit Model Formula Functions

ang	Angular Term for a Locfit model.
cpar	Conditionally parametric term for a Locfit model.
formula.locfit	Formula from a Locfit object.
gam.lf	Locfit call for Generalized Additive Models
left	One-sided left smooth for a Locfit model.
lf	Locfit term in Additive Model formula
locfit.matrix	Reconstruct a Locfit model matrix.
right	One-sided right smooth for a Locfit model.

Model Building and Selection

aicplot	Compute an AIC plot.
aic	Compute Akaike's Information Criterion.
cpplot	Compute a Cp plot.
cp	Compute Mallows' Cp for local regression models.
gcvplot	Compute a generalized cross-validation plot.
gcv	Compute generalized cross-validation statistic.
kdeb	Bandwidth selectors for kernel density estimation.
lcvplot	Compute the likelihood cross-validation plot.
lcv	Compute Likelihood Cross Validation Statistic.
lscv.exact	Exact LSCV Calculation
lscvplot	Compute the LSCV plot.
lscv	Least Squares Cross Validation Statistic.
regband	Bandwidth selectors for local regression.
sjpi	Sheather-Jones Plug-in bandwidth criterion.

Plot, Print, Summary methods

plot.gcvplot	Produce a cross-validation plot.
plot.locfit.1d	Plot a one dimensional "preplot.locfit" object.
plot.locfit.2d	Plot a two-dimensional "preplot.locfit" object.
plot.locfit.3d	Plot a high-dimensional "preplot.locfit" object using trellis displays.
plot.locfit	Plot an object of class locfit.
plot.scb	Plot method for simultaneous confidence bands
preplot.locfit.raw	Prediction from a Locfit object.
print.gcvplot	Print method for gcvplot objects
print.locfit	Print method for "locfit" object.
print.preplot.locfit	Print method for preplot.locfit objects.
print.scb	Print method for simultaneous confidence bands
print.summary.locfit	Print a Locfit summary object.
summary.gcvplot	Summary method for a gcvplot structure.
summary.locfit	Print method for a locfit object.
summary.preplot.locfit	Summary method for a preplot.locfit object.

Datasets

ais	Australian Institute of Sport Dataset
bad	Example dataset for bandwidth selection
border	Cricket Batting Dataset
chemdiab	Chemical Diabetes Dataset
claw54	Claw Dataset
cldem	Example data set for classification
cltest	Test dataset for classification
cltrain	Training dataset for classification
co2	Carbon Dioxide Dataset
diab	Exhaust emissions
ethanol	Exhaust emissions
gam.slist	Vector of GAM special terms
geyser	Old Faithful Geyser Dataset
geyser.round	Discrete Old Faithful Geyser Dataset
heart	Survival Times of Heart Transplant Recipients
insect	Insect Dataset
iris	Fisher's Iris Data (subset)
kangaroo	Kangaroo skull measurements dataset
livmet	liver Metastases dataset
mcyc	Acc(De?)celeration of a Motorcycle Hitting a Wall
mine	Fracture Counts in Coal Mines
mmsamp	Test dataset for minimax Local Regression
morths	Henderson and Sheppard Mortality Dataset
penny	Penny Thickness Dataset
spencer	Spencer's Mortality Dataset
stamp	Stamp Thickness Dataset
trimod	Generated sample from a bivariate trimodal normal mixture

Other Functions

crit<-	Substitute critical values on "locfit" object.
crit	Compute critical values for confidence intervals.
expit	Inverse logistic link function
grid	Local Regression, Likelihood and Density Estimation.
km.mrl	Mean Residual Life using Kaplan-Meier estimate
knots	Extraction of fit-point information from a Locfit object.
lfbas	User-specified basis functions for Locfit.
lfeval	Extract Locfit Evaluation Structure.
lflim	Construct Limit Vectors for Locfit fits.
lfmarg	Generate grid margins.
lines.locfit	Add `locfit' line to existing plot
panel.locfit	Locfit panel function
panel.xyplot.lf	Locfit panel function
plotbyfactor	x-y scatterplot, colored by levels of a factor.
plot.eval	Plot evaluation points from a 2-d locfit object.
plot.lfeval	Plot a Locfit Evaluation Structure.
plot.preplot.locfit	Plot a "preplot.locfit" object.
points.locfit	Add `locfit' points to existing plot
predict.locfit	Prediction from a Locfit object.
preplot.locfit	Prediction from a Locfit object.
print.lfeval	Print the Locfit Evaluation Points.
rbox	Local Regression, Likelihood and Density Estimation.
residuals.locfit	Fitted values for a Locfit object.
rv<-	Substitute variance estimate on a "locfit" object.
rv	Residual variance from a "locfit" object.
store	Save S functions.