Calls the appropriate plot function, based on the number of treatments
# S3 method for npCBPS
plot(x, covars = NULL, silent = TRUE, ...)an object of class “CBPS” or “npCBPS”, usually, a
result of a call to CBPS or npCBPS.
Indices of the covariates to be plotted (excluding the intercept). For example,
if only the first two covariates from balance are desired, set covars to 1:2.
The default is NULL, which plots all covariates.
If set to FALSE, returns the imbalances used to
construct the plot. Default is TRUE, which returns nothing.
Additional arguments to be passed to balance.