added function to get the datatype of a fixed-point object
backup before overwrite; this version works, but the rounding is only
suitable for 2^15 vector length (values hardcoded)
using *_fi functions
helper function for _fi excess kurtosis
chagned origin moment calcuations to the same format as central moment
calcs
accumulate_fi uses built-in sum function, which is properly defined for
fixed-point data
inserting subtract function
scale_fi returns data type now?
several analogues to the block generator functions
separate function to calculate fixed-point origin moments
central moment calculator but with normalized (i.e. mean) inputs instead
of raw accumulator inputs. still to be tested