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Справка Scilab >> Special Functions > gamma

gamma

The gamma function.

Syntax

y = gamma(x)

Arguments

x

real vector or matrix

y

real vector or matrix with same size than x.

Description

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!).

Examples

// 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()
plot2d(x, y, style=0, axesflag=5, rect=[a, -10, b, 10])
xtitle("The gamma function on ["+string(a)+","+string(b)+"]")
show_window()

See also

  • gammaln — The logarithm of gamma function.
  • dlgamma — derivative of gammaln function, psi function

History

ВерсияОписание
5.4.0 Overloading allowed for list, mlist, tlist and hypermatrix types.
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Tue Feb 14 15:13:25 CET 2017