ICEinfer (version 1.3)

plot.ICEepmap: Display Indifference Curves on a standardized ICE Economic Preference Map

Description

Display plots of the Indifference Curves of an ICE Economic Preference Map using the contourplot() and expand.grid() functions from the lattice R-package.

Usage

# S3 method for ICEepmap
plot(x, xygrid = FALSE, …)

Arguments

x

Output list object from either ICEepmap or ICEomega.

xygrid

Either FALSE or a grid object for a lattice of (x, y) plotting positions.

…

Optional argument(s) passed on to contourplot().

Value

NULL

Details

If xygrid == FALSE, the default xygrid wiil be a 201 x 201 lattice of equally spaced plotting positions covering the x=DeltaEffe and y=DeltaCost ranges [-10,+10]. This default is: x <- seq(-10, +10, length = 201); y <- x; xygrid <- expand.grid(x = x, y = y)

References

Cook JR, Heyse JF. Use of an angular transformation for ratio estimation in cost-effectiveness analysis. Statistics in Medicine 2000; 19: 2989-3003.

Obenchain RL. Incremental Cost-Effectiveness (ICE) Preference Maps. 2001 JSM Proceedings (Biopharmaceutical Section) on CD-ROM. (10 pages.) Alexandria, VA: American Statistical Association. 2002.

Obenchain RL. ICE Preference Maps: Nonlinear Generalizations of Net Benefit and Acceptability. Health Serv Outcomes Res Method 2008; 8: 31-56. DOI 10.1007/s10742-007-0027-2. Open Access.

See Also

ICEepmap and ICEomega

Examples

# NOT RUN {
 epm <- ICEomega(beta=0.8)
 require(lattice)
 plot(epm)
# }