erf(_:) Returns the error function for each element in a vector. Declarationfunc erf(_ x: simd_double4) -> simd_double4 See AlsoMath Functionscbrt(_:)ceil(_:)erfc(_:)floor(_:)fma(_:_:_:)fmod(_:_:)hypot(_:_:)lgamma(_:)nextafter(_:_:)pow(_:_:)remainder(_:_:)round(_:)simd_muladd(_:_:_:)tgamma(_:)trunc(_:)