Mantid::CurveFitting::SpecialFunctionSupport Namespace Reference

Functions
std::complex< double > MANTID_CURVEFITTING_DLL	exponentialIntegral (const std::complex< double > &z)
	Compute exp(z)*E1(z) where z is complex and E1(z) is the Exponential Integral. More...

Function Documentation

exponentialIntegral()

complex< double > Mantid::CurveFitting::SpecialFunctionSupport::exponentialIntegral

(

const complex< double > &

z

)

Compute exp(z)*E1(z) where z is complex and E1(z) is the Exponential Integral.

Implement Exponential Integral function, E1(z), based on formulaes in Abramowitz and Stegun (A&S) In fact this implementation returns exp(z)*E1(z) where z is a complex number.

Parameters

z

:: input

Returns

exp(z)*E1(z)

Definition at line 22 of file SpecialFunctionHelper.cpp.

References Mantid::Geometry::z.

Referenced by Mantid::CurveFitting::Functions::Bk2BkExpConvPV::calOmega(), Mantid::CurveFitting::Functions::IkedaCarpenterPV::constFunction(), and Mantid::CurveFitting::Functions::IkedaCarpenterPV::functionLocal().