Functions > Statistics > Probability Distributions > Gamma Distribution
  
Gamma Distribution
The following functions are associated with the gamma equation:
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dgamma(x, s)—Returns the probability density for value x.
pgamma(x, s)—Returns the cumulative probability distribution for value x.
qgamma(p, s)—Returns the inverse cumulative probability distribution for probability p.
rgamma(m, s)—Returns a vector of m random numbers having the gamma distribution.
Arguments
x is a scalar or vector of real values, x > 0. To allow integration and other operations over this argument, values outside of the stated range are allowed, but they produce a 0 result.
s is a real shape parameter, s > 0.
p is a real probability, 0 ≤ p ≤ 1.
m is an integer, m > 0.