Function Reference: betainv

statistics: x = betainv (p, a, b)

Inverse of the Beta distribution (iCDF).

For each element of p, compute the quantile (the inverse of the CDF) of the Beta distribution with shape parameters a and b. The size of x is the common size of x, a, and b. A scalar input functions as a constant matrix of the same size as the other inputs.

Further information about the Beta distribution can be found at https://en.wikipedia.org/wiki/Beta_distribution

See also: betacdf, betapdf, betarnd, betafit, betalike, betastat

Source Code: betainv

Example: 1

  

 ## Plot various iCDFs from the Beta distribution
 p = 0.001:0.001:0.999;
 x1 = betainv (p, 0.5, 0.5);
 x2 = betainv (p, 5, 1);
 x3 = betainv (p, 1, 3);
 x4 = betainv (p, 2, 2);
 x5 = betainv (p, 2, 5);
 plot (p, x1, "-b", p, x2, "-g", p, x3, "-r", p, x4, "-c", p, x5, "-m")
 grid on
 legend ({"α = β = 0.5", "α = 5, β = 1", "α = 1, β = 3", ...
          "α = 2, β = 2", "α = 2, β = 5"}, "location", "southeast")
 title ("Beta iCDF")
 xlabel ("probability")
 ylabel ("values in x")
plotted figure