On Sat, 2004-04-17 at 19:06, Faheem Mitha wrote:
Hi,
The following does not work. I am trying to do something similar to add.reduce, except that I want strings concatenated across the appropriate axes. I was hoping that Python would "magically" recognise that addition in strings translated to concatenation.
Use object arrays (numarray.objects) instead. While CharArrays do have an overloaded add operator they don't support reduction. Object arrays have more general ufuncs which apply object oriented operators and also support reduction. In general, character arrays (numarray.strings) do not support the numerical ufuncs found in numarray
Incidentally, the error message is not terribly imformative.
True enough. The numerical getShape code should recognize strings and raise an exception pointing out that strings can't be passed into numerical code. This is fixed in CVS.
Is there any way to make this work, or any other method people can suggest, or do I need to write my own function?
Again, use numarray.objects.
Thanks. Regards, Faheem.
********************************************************************** In [43]: s Out[43]: CharArray([['a', 'b', 'c'], ['d', 'e', 'f'], ['g', 'h', 'i']])
In [44]: numarray.add.reduce(s,1) --------------------------------------------------------------------------- error Traceback (most recent call last)
/home/faheem/wc/corrmodel/boost/<console>
error: getShape: sequence object nested more than MAXDIM
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