This graph displays either the annual exceedence frequency or the frequency density per velocity bin according to the parameter histf as set in the params.m file. The velocity used depends on the value of htype in the params file and the type of event set. The default value of 2 gives the maximum winds of each event within the specified distance of the point of interest, for a circular filter, or at the point that events cross over line segments for poly filters. (The "maximum winds" in this case are the maximum winds anywhere in the storm at the point it crosses one of the line segments in poly.) The value 1 gives the lifetime maximum wind for all events in the set, and the value of 3 gives the maximum wind at the point of interest when a circular filter is used. (For poly filters, choice 3 is the same as choice 2). Under the entry Histograms and return period plots in the params file, other aspects of the graph and data can be set including the range of best-track years to use, the range of wind speeds to consider, and the width of the wind speed bins.