balanceplot             Create a plot of the balance on variables
                        across different stratifications.
nuclearplants           Nuclear Power Station Construction Data
plot.xbal               Plot of balance across multiple strata
print.xbal              Printing xBalance Objects
subset.xbal             Select variables, strata, and statistics from a
                        'xbal' object
xBalance                Standardized Differences for Stratified
                        Comparisons
xtable.xbal             An 'xtable' method for 'xbal' objects
