sample.size: compute sample size by group

In byandell/pda: Practial Data Analysis for Designed Experiments

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)

byandell/pda documentation built on May 13, 2019, 9:27 a.m.