plot.iptw: Plots for 'iptw' objects

In twang: Toolkit for Weighting and Analysis of Nonequivalent Groups

Plots for iptw objects

Description

This function produces a collection of diagnostic plots for iptw objects.

Usage

## S3 method for class 'iptw'
plot(
  x,
  plots = "optimize",
  subset = NULL,
  color = TRUE,
  timePeriods = NULL,
  multiPage = FALSE,
  figureRows = NULL,
  hline = c(0.1, 0.5, 0.8),
  ...
)

Arguments

x	An iptw object.
plots	An indicator of which type of plot is desired. The options are ⁠"optimize" or 1⁠ A plot of the balance criteria as a function of the GBM iteration. ⁠"boxplot" or 2⁠ Boxplots of the propensity scores for the treatment and control cases ⁠"es" or 3⁠ Plots of the standardized effect size of the pre-treatment variables before and after reweighing ⁠"t" or 4⁠ Plots of the p-values from t-statistics comparing means of treated and control subjects for pretreatment variables, before and after weighting. ⁠"ks" or 5⁠ Plots of the p-values from Kolmogorov-Smirnov statistics comparing distributions of pretreatment variables of treated and control subjects, before and after weighting.
subset	Used to restrict which of the stop.methods will be used in the figure. For example subset = c(1,3) would indicate that the first and third stop.methods (in alphabetical order of those specified in the original call to iptw) should be included in the figure.
color	If color = FALSE, figures will be gray scale. Default: TRUE.
timePeriods	The number of distinct time points. If NULL, this is assumed to be the number of ps objects (i.e., the number of distinct time points).
multiPage	When multiple frames of a figure are produced, multiPage = TRUE will print each frame on a different page. This is intended for situations where the graphical output is being saved to a file. Default: FALSE.
figureRows	The figure rows, passed to displayPlots. Default: NULL.
hline	Arguments passed to panel.abline.
...	Additional arguments.

Details

This function produces lattice-style graphics of diagnostic plots.

References

Dan McCaffrey, G. Ridgeway, Andrew Morral (2004). "Propensity Score Estimation with Boosted Regression for Evaluating Adolescent Substance Abuse Treatment", Psychological Methods 9(4):403-425.

See Also

iptw

twang documentation built on Sept. 11, 2024, 8:47 p.m.