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See the recommended documentation of this function

Aide de Scilab >> Fonctions spéciales > gamma

gamma

The gamma function.

Calling Sequence

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()
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()

See Also

  • gammaln — Le logarithme de la fonction gamma.
  • dlgamma — dérivée de la fonction gammaln ou fonction psi.

History

VersionDescription
5.4.0 Overloading allowed for list, mlist, tlist and hypermatrix types.
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Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
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Last updated:
Thu Oct 02 13:54:33 CEST 2014