# FFTW is a fast FFT library with rich features. One of its strength 
# is to provide multidimensional FFT with istride and idist, which 
# may avoid any transformation of the input NumPy array. 
# For a large NumPy array, such a feature is really very desirable.
# The wrapper here uses the above feature to avoid transforming
# the input array. And special attention is paid to avoid unnecessary
# copying of array.
#
# Comments and improvements are very welcome.
#
#
# Min Xu
# minxu@sci.ccny.cuny.edu
#
