lattice (version 0.3-1)

oneway: Fit One-way Model

Description

Fits a One-way model to univariate data grouped by a factor, the result often being displayed using rfs

Usage

oneway(formula, data, location=mean, spread=function(x) sqrt(var(x)))

Arguments

formula

formula of the form y ~ x where y is the numeric response and x is the grouping factor

data

data frame in which the model is to be evaluated

location

function or numeric giving the location statistic to be used for centering the observations, e.g. median, 0 (to avoid centering).

spread

function or numeric giving the spread statistic to be used for scaling the observations, e.g. sd, 1 (to avoid scaling).

Value

• A list with components
• location
  vector of locations for each group.
• spread
  vector of spreads for each group.
• fitted.values
  vector of locations for each observation.
• residuals
  residuals (y - fitted.values).
• scaled.residuals
  residuals scaled by spread for their group

See Also

rfs, Lattice