The gamma function.
y = gamma(x)
real vector or matrix
real vector or matrix with same size than x.
gamma(x) evaluates the gamma function at all the
elements of x. The gamma function is defined by
:

and generalizes the factorial function for real numbers
(gamma(n+1) = n!).
// simple examples gamma(0.5) gamma(6)-prod(1:5) | ![]() | ![]() |
// the graph of the Gamma function on [a,b] a = -3; b = 5; x = linspace(a,b,40000)'; y = gamma(x); clf() c=xget("color") xset("color",2) plot2d(x, y, style=0, axesflag=5, rect=[a, -10, b, 10]) xset("color",c) xtitle("The gamma function on ["+string(a)+","+string(b)+"]") show_window() | ![]() | ![]() |

| Version | Description |
| 5.4.0 | Overloading allowed for list, mlist, tlist and hypermatrix types. |