convertToProp           Function to Convert a Vector Into Proportions.
getEstimates            Function to Estimate x Given y.
nplr                    Function to Fit n-Parameter Logistic
                        Regressions.
nplrAccessors           'nplr' accessor functions
overlay                 Plotting Multiple 'nplr' Objects
plot.nplr               Plotting 'nplr' Objects
summary.nplr            summaryzing 'nplr' Objects
