3.5.3.2.9 Erfcinv

Definition:

The x = erfcinv(y) function computes the value of the inverse complementary error function for specified y. The y value should be within the range, [0, 2]. The function satisfies the complementary error function y = erfc(x) for 0 ≤ y ≤ 2 and -∞ ≤ x ≤ +∞.

Parameters:

y (input, double)
The argument y of the function, must lie in the interval [0, 2]
x (output, double)
The return value of the inverse of the complementary error function for specified y.