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Math - Special Functions

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Title 
Description 
BESELI Returns the I Bessel function of order N for X.
BESELJ Returns the J Bessel function of order N for X.
BESELK Returns the K Bessel function of order N for X.
BESELY Returns the Y Bessel function of order N for X.
BETA Returns the value of the beta function.
ERF Returns the value of an error function.
ERFC Returns the value of a complementary error function.
ERFCX Returns the value of a scaled complementary error function.
EXPINT Returns the value of the exponential integral.
GAMMA Returns the gamma function of X.
GAUSS_QUAD_LEGENDRE Returns an array containing the x values (the abscissas) for Gaussian quadrature integration, where the x values are the roots of the Legendre polynomial of order N.
IBETA Computes the incomplete beta function.
IGAMMA Computes the incomplete gamma function.
LAGUERRE Returns value of the associated Laguerre polynomial.
LEGENDRE Returns value of the associated Legendre polynomial.
LNGAMMA Returns logarithm of the gamma function of X.
SPHER_HARM Returns value of the spherical harmonic function.
SPHERE_HARM_FILTER Uses the spherical harmonic transform to perform a spectral filter on a two-dimensional array of data values on a sphere.
SPHERE_HARM_FORWARD Uses the Gauss-Legendre algorithm to compute the forward spherical harmonic transform of a two-dimensional input array on a spherical coordinate grid.
SPHERE_HARM_INVERSE Uses the Gauss-Legendre algorithm to compute the inverse spherical harmonic transform of an input array, and return the result on a spherical coordinate grid, where the output latitudes are on a Gauss-Legendre grid.
SPHERE_HARM_KERNEL Constructs the kernel coefficients for a triangular filter of a spherical harmonic transform using the isotropic smoothing function of Sardeshmukh and Hoskins.



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