Erfcx

Definition:

The y = erfcx(x) function is the scaled complementary error function, defined as

\[erfcx(x) = e^{x^2}\cdot erfc(x)\]

where erfc(x) is the complementary error function.

When x is very large, erfcx(x) is approximately \(\frac 1{\sqrt{\pi }\cdot x}\).

Parameters:

x (input, double)

The argument x of the function.

y (output, double)

The approximate value of the scaled complementary error function.