On Tue, May 17, 2011 at 8:05 AM, Pearu Peterson <[email protected]>wrote:
> > > On Tue, May 17, 2011 at 12:04 AM, Nikolas Tautenhahn <[email protected]>wrote: > >> Hi, >> >> > Here >> > >> > >> http://code.google.com/p/pylibtiff/source/browse/#svn%2Ftrunk%2Flibtiff%2Fbitarray-0.3.5-numpy >> > >> > you can find bitarray with numpy support. >> > >> >> Thanks, that looks promising - to get a numpy array, I need to do >> >> numpy.array(bitarray.bitarray(numpy.binary_repr(i, l))) >> >> for an integer i and l with i < 2**l, right? >> >> > If l < 64 and little endian is assumed then you can use the > > fromword(i, l) > > method: > > >>> from libtiff import bitarray > >>> barr = bitarray.bitarray(0, 'little') > >>> barr.fromword(3,4) > >>> barr > bitarray('1100') > > that will append 4 bits of the value 3 to the bitarray barr. > >>> numpy.array(barr) array([ True, True, False, False], dtype=bool) to complete the example... Pearu > Also check out various bitarray `to*` and `from*` methods. > > HTH, > Pearu >
_______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
