rattle (version 2.6.25)

plotOptimalLine: Plot three lines on a risk chart, one vertical and two horizontal

Description

Plots a a vertical line at x up to max of y1 and y2, then horizontal from this line at y1 and y2. Intended for plotting on a plotRisk.

Usage

plotOptimalLine(x, y1, y2, pr = NULL, colour = "plum", label = NULL)

Arguments

x

location of vertical line.

y1

location of one horizontal line.

y2

location of other horizontal line.

pr

Aprint a percentage at this point.

colour

of the line.

label

at bottom of line.

Details

Intended to plot an optimal line on a Risk Chart as plotted by plotRisk.

References

Package home page: http://rattle.togaware.com

See Also

plotRisk.

Examples

## this is usually used in the context of the plotRisk function
ev <- evaluateRisk(predicted, actual, risk)

## imitate this output here
ev <- NULL
ev$Caseload  <- c(1.0, 0.8, 0.6, 0.4, 0.2, 0)
ev$Precision <- c(0.15, 0.18, 0.21, 0.25, 0.28, 0.30)
ev$Recall    <- c(1.0, 0.95, 0.80, 0.75, 0.5, 0.0)
ev$Risk      <- c(1.0, 0.98, 0.90, 0.77, 0.30, 0.0)

## plot the Risk Chart
plotRisk(ev$Caseload, ev$Precision, ev$Recall, ev$Risk,
         chosen=60, chosen.label="Pr=0.45")

## plot the optimal point
plotOptimalLine(40, 77, 75, colour="maroon")