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Scilab help >> Elementary Functions > Discrete mathematics > factorial

factorial

階乗関数

呼び出し手順

f = factorial ( n )

パラメータ

n :

doubleの行列. 値は正の整数である必要があります.

f :

doubleの行列.

説明

nの階乗,つまり,整数 1 * 2 * ... * nの積を返します.

この関数は n > 170 となるとオーバーフローします.

// Make a table of factorial
n = (0:30)';
[n factorial(n)]

// See the limits of factorial: f(171)=%inf
factorial(170) // 7.257415615307998967e306
factorial(171) // %inf

// Plot the function on all its range.
scf();
plot ( 1:170 , factorial , "b-o" )
h = gcf();
h.children.log_flags="nln";

参考文献

Introduction to discrete probabilities, Michael Baudin

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Last updated:
Mon Oct 01 17:40:23 CEST 2012