faganPlot: Fagan-Nomogram

In biostatUZH: Misc Tools of the Department of Biostatistics, EBPI, University of Zurich

Description

In

Usage

faganPlot(prob.pre.init = c(0.1, 0.2, 0.5, 1, 2, 5, 10, 
    20, 30, 40, 50, 70, 85), 
    text = 0.8, language = c("german", "english")[1], 
    tit = "Fagan - Nomogramm")
faganLine(prob.pre, lik.ratio = c(1, 1))

Arguments

prob.pre.init	Pre-test probabilities to be used for the vertical line to the left. May be a number or a vector withe entries in (0,1).
text	Size of the text displayed in the plot.
language	Choose language.
tit	Title to be added to plot, or NA if to be left blank.
prob.pre	A single number or a vector of pre-test probabilities to be drawn a line in the Fagan-plot for.
lik.ratio	Likelihood ratios to be used. Must be of same length as prob.pre.

Value

Nothing is returned. faganPlot draws a Fagan-Nomogram and faganLine adds lines for specific pre-test probabilities and likelihood ratios to the plot.

Author(s)

Kaspar Rufibach
[e-mail]

References

Fagan, T.J. (1975). Letter: Nomogram for Bayes Theorem. N. Engl. J. Med, 293, 257.

Examples

# empty Fagan plot
faganPlot()

# Fagan lines
faganLine(prob.pre = 0.75, lik.ratio = c(0.9/0.37, 0.1/0.63))

biostatUZH documentation built on May 2, 2019, 6:06 p.m.