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FreeMat
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Section: Mathematical Functions
Computes the natural log of the gamma function for real arguments. The gammaln function takes only a single argument
y = gammaln(x)
where x is either a float or double array. The output vector y is the same size (and type) as x.
Here is a plot of the gammaln function over the range [-5,5].
--> x = linspace(0,10);
--> y = gammaln(x);
--> plot(x,y); xlabel('x'); ylabel('gammaln(x)');
which results in the following plot.