* NArray properties:
+ Fast and easy calculation for large numerical array.
+ Accepting Elements:
8,16,32 bit integer, single/double float/complex, Ruby Object.
+ Easy extraction/substitution of array subset,
using assignment with number, range, array index.
+ Operator: +,-,*,/,%,**, etc.
+ FFTW version 2 or 3 is separately supported.
+ NImage: Image viewer class.
+ Ruby/PGPLOT: Graphics library interface (separately distributed)
X-Y Graph, Histogram, Contour map, Image map, etc.
* NArray is similar to:
+ Python/NumPy, Perl/PDL, Yorick, IDL
