ERFCX

Purpose:

Computes the scaled complementary error function.

ERFCX(val)

val

A scalar, series, or table.

A scalar, series, or table.

erfcx(1)

returns 0.427584.

erfcx(1 + i)

returns 0.304744 - 0.208219i

erfcx(-2..0.01..2);

xlabel("x");ylabel("erfcx(x)");label("Scaled Complementary Error Function");

returns 401 samples of erfcx(x).

The scaled complementary error function is defined as:

where:

$image\erfc01.gif$

For large values of x,

ERFCX is computed from the FADDEEVA function based on an algorithm developed by Steven G. Johnson. The Faddeeva function is defined as: