cg (version 0.9-5)

samplesizeGraph: Graph Estimated Sample Sizes

Description

Generic function to graph a table of estimated sample sizes, using a Sample Size table created by the cg package.

Usage

samplesizeGraph(sstable, Nscale = "log", mmdscale = "log",
 cgtheme=TRUE, device = "single", ...)

Arguments

sstable

A samplesizeTable created by a samplesizeTable method from the cg package.

Nscale

A character indicating whether the y-axis, which shows the estimated samples sizes, should be drawn on the log scale ("log") or the original scale ("original").

mmdscale

A character indicating whether the x-axis, which shows the minimum meaningful differences to be detected, should be drawn on the log scale ("log") or the original scale ("original").

cgtheme

When set to the default TRUE, ensures a trellis device is active with limited color scheme. Namely background, strip.shingle, and strip.background are each set to "white".

device

Can be one of three values: [object Object],[object Object],[object Object]

...

Additional arguments, depending on the specific method written for the object. See the specific methods for additional details.

Value

• The main purpose is the side effect of graphing to the current device. See the specific methods for discussion of any return values.

See Also

samplesizeGraph.cgOneFactorSampleSizeTable

Examples

data(canine)
canine.data <- prepareCGOneFactorData(canine, format="groupcolumns",
                                      analysisname="Canine",
                                      endptname="Prostate Volume",
                                      endptunits=expression(plain(cm)^3),
                                      digits=1, logscale=TRUE, refgrp="CC")
canine.fit <- fit(canine.data)

canine.samplesize <- samplesizeTable(canine.fit, direction="increasing", 
                                     mmdvec=c(10, 25, 50, 75, 100))

samplesizeGraph(canine.samplesize)