prettyR (version 1.0-4)

brkdn: Breakdown of a numeric variable by grouping variable(s)

Description

Calculates means, variances and ns for subgroups of numeric observations and displays the results.

Usage

brkdn(formula,dataframe,maxlevels=10,do.sd=FALSE)

Arguments

formula

a formula with the variable to be broken down on the left and the names of one or more variables defining subgroups on the right

dataframe

the data frame from which to select the variables

maxlevels

the maximum number of levels in any subgroup

do.sd

logical - whether to return standard deviations instead of variances

Value

• The results of dstats, or a multi-level list if more than one grouping variable is specified.

Details

brkdn will accept a formula referring to columns in a data frame. It calls dstats for the calculations and displays a table of results.

See Also

dstats

Examples

test.df<-data.frame(Age=rnorm(100)+3*10,Sex=sample(c("M","F"),100,TRUE),
  Employ=sample(c("FT","PT","NO"),100,TRUE))
 brkdn(Age~Sex+Employ,test.df)