erf

Error function.

Syntax

v = erf(x)

Description

Returns (2/√π) · ∫₀ˣ exp(-t²) dt — the error function. Closely related to the standard-normal CDF: Φ(x) = 0.5 · (1 + erf(x/√2)).

Example

erf(1)                 % ≈ 0.8427

See also

• erfc — Complementary error function 1 - erf(x).
• erfcx — Scaled complementary error function exp(x²) · erfc(x).
• erfinv — Inverse error function.
• norm_s_dist — Standard-normal PDF or CDF.