group.CI: Group Confidence Interval

In RyanHope/Rmisc: Rmisc: Ryan Miscellaneous

Description

Calculates the confidence interval of grouped data

Usage

group.CI(x, data, ci = 0.95)

Arguments

x	an 'aggregate' compatible formula
data	a data frame (or list) from which the variables in formula should be taken
ci	the confidence interval to be calculated

Value

A data frame consisting of one column for each grouping factor plus three columns for the upper bound, mean and lower bound of the confidence interval for each level of the grouping factor

Examples

require(latticeExtra)
with(group.CI(weight~feed,chickwts),
 segplot(feed~weight.lower+weight.upper,center=weight.mean)
)

require(Hmisc)
with(group.CI(Temp~Month,airquality),
 xYplot(Cbind(Temp.mean,Temp.lower,Temp.upper)~numericScale(Month),type="b",ylim=c(60,90))
)

RyanHope/Rmisc documentation built on May 9, 2019, 10:38 a.m.