sample.size {pda}R Documentation

compute sample size by group

Description

Usage

sample.size(object, ...)
## Default S3 method:
sample.size(object, ...)
## S3 method for class 'lm':
sample.size(object, data, factors, na.action, ...)

Arguments

object vector or list of vectors, or object from linear model fit
... additional vectors in implicit list
data data frame in which to interpret the variables named inthe full and reduced objects (determined from reduced fit if omitted)
factors Character string of length 2 with names of x.factor and trace.factoras found in fit and data (default is first 2 factors in fit).
na.action missing data action

Value

In the case of a list of vectors, a vector of their lengths. For a linear model object, the sample size by factors.

Examples

## Not run: 
sample.size(list(x1,x2,x3))
sample.size(x1,x2,x3)
sample.size(lm(y~a+b,data))
## End(Not run)

[Package pda version 1.2-3 Index]