Function lchoose

Logarithm of the absolute value of the binomial coefficient. Equivalent to R's lchoose(). Takes single numbers: log(abs(choose(n, k))), computed without overflow.

Edge cases where R differs from the mathematical value, followed by default (rCompatible: false returns the mathematical value instead): n within 1e-9 max(1, |n|) of an integer is treated as that integer (for k >= 2; for n < 0 the tolerance is relative to k - 1 - n); lchoose(n, Infinity) is -Infinity for n >= 0 (otherwise NaN); lchoose(±Infinity, k) is NaN for k >= 2 (Infinity for k = 1).