- type: type of output graph. type = "QQ"
(default) outputs empirical quantile-quantile plots of each
covariate to check balance of marginal distributions. Alternatively,
type = "jitter" outputs jitter plots of the propensity
score for treated and control units. Finally, type="hist" outputs
histograms of the propensity score in the original treated and control groups
and weighted histograms of the propensity score in the matched treated and control groups.
- discrete.cutoff: For quantile-quantile plots, discrete
covariates that take 5 or fewer values are jittered for visibility.
This may be changed by setting this argument to any other positive
integer.
- interactive: If TRUE (default), users can
identify individual units by clicking on the graph with the left
mouse button, and (when applicable) choose subclasses to plot.
- which.xs: For quantitle-quantile plots, specifies particular covariate names in a
character vector to plot only a subset of the covariates.
- subclass: If interactive = FALSE, users can
specify which subclass to plot.
Gary King
2009-10-25
