triinv
              Inverse of the triangular cumulative distribution function (iCDF).
 For each element of p, compute the quantile (the inverse of the CDF) of
 the triangular distribution with parameters a, b, and c on
 the interval [a, b].  The size of x is the common
 size of the input arguments.  A scalar input functions as a constant matrix
 of the same size as the other inputs.
Further information about the triangular distribution can be found at https://en.wikipedia.org/wiki/Triangular_distribution
See also: tricdf, tripdf, trirnd
Source Code: triinv
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 ## Plot various iCDFs from the triangular distribution
 p = 0.001:0.001:0.999;
 x1 = triinv (p, 3, 6, 4);
 x2 = triinv (p, 1, 5, 2);
 x3 = triinv (p, 2, 9, 3);
 x4 = triinv (p, 2, 9, 5);
 plot (p, x1, "-b", p, x2, "-g", p, x3, "-r", p, x4, "-c")
 grid on
 ylim ([0, 10])
 legend ({"a = 3, b = 6, c = 4", "a = 1, b = 5, c = 2", ...
          "a = 2, b = 9, c = 3", "a = 2, b = 9, c = 5"}, ...
         "location", "northwest")
 title ("Triangular CDF")
 xlabel ("probability")
 ylabel ("values in x")
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