On Tue, Feb 21, 2017 at 3:05 PM, Alex Rogozhnikov <alex.rogozhnikov@yandex.ru> wrote:

a question about numpy.recarray:
There is a parameter order in constructor https://docs.scipy.org/doc/numpy-1.10.1/reference/generated/numpy.recarray.html, but it seems to have no effect:
x = numpy.recarray(dtype=[('a', int), ('b', float)], shape=[1000], order='C')

you are creating a 1D array here -- there is no difference between Fortran and C order for a 1D array. For 2D:

In [2]: x = numpy.recarray(dtype=[('a', int), ('b', float)], shape=[10,10], order='C')

In [3]: x.strides
Out[3]: (160, 16)

In [4]: y = numpy.recarray(dtype=[('a', int), ('b', float)], shape=[10,10], order='F')

In [5]: y.strides
Out[5]: (16, 160)

note the easier way to get the strides, too :-)

-CHB

Christopher Barker, Ph.D.
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