Convert a three-dimensional array of spherical harmonic coefficients to a two-dimensional indexed array.
call SHCilmToCindex (cilm, cindex, degmax)
cilm : input, real*8, dimension (2, lmaxin+1, lmaxin+1)
: The input spherical harmonic coefficients. cilm(1,:,:) and cilm(2,:,:) correspond to either the real and imaginary components, or cosine and sine coefficients, respectively.
cindex : output, real*8, dimension (2, (degmax+1)*(degmax+2)/2)
: The indexed output spherical harmonic coefficients.
degmax : input, optional, integer, default = lmaxin
: The maximum degree of the output coefficients.
SHCilmToCindex will convert a three-dimensional array of spherical harmonic coefficients to a two-dimensional indexed array. The degree l and order m corresponds to the index l*(l+1)/2+m+1. The default is to convert the entire array cilm, but a subset of this array can be converted by specifying the optional argument degmax.