[Numpy-discussion] Dict of lists to numpy recarray

Tom Denniston tom.denniston@alum.dartmouth....
Fri Aug 24 16:59:53 CDT 2007


Try itertools.izipping the lists and then use numpy.fromiter.

On 8/24/07, Sean Davis <seandavi@gmail.com> wrote:
>
>
> On 8/24/07, Sean Davis <seandavi@gmail.com> wrote:
> > I have a simple question (I assume), but I can't quite get a handle on the
> answer.  I have a dict with each member a list having a long (>5M elements).
>  I would like to convert that into a numpy recarray.  So far, my only
> thought is to loop over the length of the lists and convert to a list of
> tuples--this is SLOW.  What I really need to be able to do is to supply
> columns of data to create a recarray, but I haven't found an example of how
> to do that.
>
> Sorry for the noise.  Found it.
>
> newrecarray =
> numpy.rec.fromarrays([x1,x2,x3],names='x1,x2,x3',formats='f8,i8,i8')
>
> Sean
>
>
>
>
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>


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