vmpdf
              Von Mises probability density function (PDF).
For each element of x, compute the probability density function (PDF) of the von Mises distribution with location parameter mu and concentration parameter k on the interval [-pi, pi]. The size of y is the common size of x, mu, and k. A scalar input functions as a constant matrix of the same size as the other inputs.
Further information about the von Mises distribution can be found at https://en.wikipedia.org/wiki/Von_Mises_distribution
Source Code: vmpdf
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 ## Plot various PDFs from the von Mises distribution
 x1 = [-pi:0.1:pi];
 y1 = vmpdf (x1, 0, 0.5);
 y2 = vmpdf (x1, 0, 1);
 y3 = vmpdf (x1, 0, 2);
 y4 = vmpdf (x1, 0, 4);
 plot (x1, y1, "-r", x1, y2, "-g", x1, y3, "-b", x1, y4, "-c")
 grid on
 xlim ([-pi, pi])
 ylim ([0, 0.8])
 legend ({"μ = 0, k = 0.5", "μ = 0, k = 1", ...
          "μ = 0, k = 2", "μ = 0, k = 4"}, "location", "northwest")
 title ("Von Mises PDF")
 xlabel ("values in x")
 ylabel ("density")
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