geopdf
              Geometric probability density function (PDF).
For each element of x, compute the probability density function (PDF) of the geometric distribution with probability of success parameter ps. The size of y is the common size of x and ps. A scalar input functions as a constant matrix of the same size as the other inputs.
The geometric distribution models the number of failures (x) of a Bernoulli trial with probability ps before the first success.
Further information about the geometric distribution can be found at https://en.wikipedia.org/wiki/Geometric_distribution
See also: geocdf, geoinv, geornd, geofit, geostat
Source Code: geopdf
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 ## Plot various PDFs from the geometric distribution
 x = 0:10;
 y1 = geopdf (x, 0.2);
 y2 = geopdf (x, 0.5);
 y3 = geopdf (x, 0.7);
 plot (x, y1, "*b", x, y2, "*g", x, y3, "*r")
 grid on
 ylim ([0, 0.8])
 legend ({"ps = 0.2", "ps = 0.5", "ps = 0.7"}, "location", "northeast")
 title ("Geometric PDF")
 xlabel ("values in x (number of failures)")
 ylabel ("density")
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