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Function Reference: unidcdf

statistics: p = unidcdf (x, N)
statistics: p = unidcdf (x, N, "upper")

Discrete uniform cumulative distribution function (CDF).

For each element of x, compute the cumulative distribution function (CDF) of a discrete uniform distribution with parameter N, which corresponds to the maximum observable value. unidcdf assumes the integer values in the range [1,N] with equal probability. The size of p is the common size of x and N. A scalar input functions as a constant matrix of the same size as the other inputs.

The maximum observable values in N must be positive integers, otherwise NaN is returned.

[…] = unidcdf (x, N, "upper") computes the upper tail probability of the discrete uniform distribution with maximum observable value N, at the values in x.

Warning: The underlying implementation uses the double class and will only be accurate for N < flintmax (2^53 on IEEE 754 compatible systems).

Further information about the discrete uniform distribution can be found at https://en.wikipedia.org/wiki/Discrete_uniform_distribution

See also: unidinv, unidpdf, unidrnd, unidfit, unidstat

Source Code: unidcdf

Example: 1

 

 ## Plot various CDFs from the discrete uniform distribution
 x = 0:10;
 p1 = unidcdf (x, 5);
 p2 = unidcdf (x, 9);
 plot (x, p1, "*b", x, p2, "*g")
 grid on
 xlim ([0, 10])
 ylim ([0, 1])
 legend ({"N = 5", "N = 9"}, "location", "southeast")
 title ("Discrete uniform CDF")
 xlabel ("values in x")
 ylabel ("probability")

                    
plotted figure