This function makes a half normal plot of the elements of the vector called effects
halfnorm(effects, labs, alpha = 0.05, refline = "TRUE")
input - vector of effects to be plotted
input - vector of labels of the effects to be plotted
input - alpha level for labeling of significant effects using Lenth statistic
input - logical variable that indicates whether a reference line is added to the plot (default is "TRUE")
John Lawson