balanceplot             Create a plot of the balance on variables
                        across different stratifications.
flatten.xbalresult      Flattens xBalance output.
formula.xbal            Returns 'formula' attribute of an 'xbal'
                        object.
harmonic                Harmonic mean
makePval                Get p-value for Z-stats
naImpute                Impute NA's
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
withOptions             Safe way to temporarily override options()
xBalance                Standardized Differences for Stratified
                        Comparisons
xBalance.find.goodstrats
                        xBalance helper function
xBalance.make.stratwts
                        xBalance helper function
xBalance.makeMM         Helper function for xBalance
xBalance.makepooledsd   xBalance helper function
xBalanceEngine          xBalance helper function
xtable.xbal             An 'xtable' method for 'xbal' objects
