FourHbootstrap          Bootstraps of the 4H-index
FourHcentroid           Centroid of bootstrapped 4H-indices
FourHcompare            Tests whether multiple systems have
                        significantly different 4H-indices
FourHnullplane          Null Plane
FourHnullplaneD         Bootstrap Distribution Around the Null Plane
FourHquaternary         Plot bootstrapped 4H-indices
FourHquaternaryC        Plot centroid of bootstrapped 4H-indices
