I'd like a more direct method that is stand-alone - not dependent on IDL, for instance.Īny thoughts about how this could be done? I'm willing to use open-source libraries, but it would be nice to not have to.
#Idl interpolate code
The size of my data is larger than my existing code (written in IDL) can handle, and converting to spherical space is unnecessary for my purposes. I only want to interpolate within the sphere, however: for points corresponding to r
#Idl interpolate 64 Bit
Landsman July 1999 Work for unsigned, 64 bit integers W. In IDL, Gridding, a topic closely related to interpolation, is the problem of creating uniformlyspaced planar data from irregularlyspaced data. Landsman September 1997 Added NoInterp keyword W. interpolation methods are available, such as linear, bilinear, cubic, spline, kriging and triangular irregular network (TIN). nlm = (nm+1)*(nm+2)/2 (the total number of l, m combinations) Landsman October, 1988 Modified to use the new INTERPOLATE function June, 1992 Modified to always return REAL4 October, 1992 Added MISSING keyword August, 1993 Converted to IDL V5.0 W.
Spherical harmonics (triangular truncation, without aliasing from transform):.Radial levels: rMin The spherical harmonics are mapped to a physical spherical grid containing Ni latitudes and Nj longitudes via a triangular truncation. The output data of my spherical, pseudo-spectral simulation has Nr radial levels between rMin and rMax, each containing a set of finite-order spherical harmonics for longitude and latitude. I'm trying to interpolate spherical harmonics to a cubic, Cartesian grid.