ecided that it is most useful for
          the supported range to <span class="bold"><strong>exclude</strong></span> random
          variate values like exact zero <span class="bold"><strong>if the end point is
          discontinuous</strong></span>. For example, the Weibull (scale 1, shape 1) distribution
          smoothly heads for unity as the random variate x declines towards zero.
          But at x = zero, the value of the pdf is suddenly exactly zero, by definition.
          If you are plotting 