example of sgsim_3D and 3d variogram functions from gslib

[pradhyumna85]

There there any example (using some hard data, krigging) of sgsim_3D function from gslib module that could be shared in the repo. As it seems the function is also not complete/working, for eg. some parameters like hmed1 etc are undefined

GeostatsPy/geostatspy/GSLIB.py

Line 1990 in bd2ef51

def sgsim_3D(nreal, df, xcol, ycol, zcol, vcol, nx, ny, nz, hsiz, vsiz, seed, var, output_file):