[Numpy-discussion] save a matrix

Charles R Harris charlesr.harris at gmail.com
Thu Nov 30 23:12:03 CST 2006


On 11/30/06, Keith Goodman <kwgoodman at gmail.com> wrote:
>
> What's a good way to save matrix objects to file for later use? I just
> need something quick for debugging.
>
> I saw two suggestions on this list from Francesc Altet (2006-05-22):
>
> 1. Use tofile and fromfile and save the meta data yourself.
>
> 2. pytables
>
> Any suggestions for #3?

Is this what you want?

In [14]: a
Out[14]:
matrix([[2, 3],
        [4, 5]])

In [15]: b
Out[15]:
matrix([[2, 3],
        [4, 5]])

In [16]: f = open('dump.pkl','w')

In [17]: pickle.dump(a,f)

In [18]: pickle.dump(b,f)

In [19]: f.close()

In [20]: f = open('dump.pkl','r')

In [21]: x = pickle.load(f)

In [22]: y = pickle.load(f)

In [23]: f.close()

In [24]: x
Out[24]:
matrix([[2, 3],
        [4, 5]])

In [25]: y
Out[25]:
matrix([[2, 3],
        [4, 5]])

Chuck
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