group.UCL
From Rmisc v1.5
by Ryan Hope
Group UpperCenterLower
Applies a function which calculates a parameter with lower/uper bounds to groups of data.
 Keywords
 multivariate
Usage
group.UCL(x, data, FUN, ...)
Arguments
 x
 an `aggregate` compatible formula
 data
 a data frame (or list) from which the variables in formula should be taken.
 FUN
 the function to apply to each group
 ...
 extra params passed on to aggregate
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 standard error
interval for each level of the grouping factor.
Examples
require(latticeExtra)
with(group.UCL(weight~feed,chickwts,FUN=CI),
segplot(feed~weight.lower+weight.upper,center=weight.mean)
)
require(Hmisc)
with(group.UCL(Temp~Month,airquality,FUN=STDERR),
xYplot(Cbind(Temp.mean,Temp.lower,Temp.upper)~numericScale(Month),type="b",ylim=c(60,90))
)
Community examples
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