[Numpy-discussion] A bit of advice?
Thu Jun 23 07:20:32 CDT 2011
Olivier Delalleau wrote:
> What about :
> dict((k, [e for e in arr if (e['x0'], e['x1']) == k]) for k in cases)
Not bad! Thanks!
BTW, is there an easier way to get the unique keys, then this:
cases = tuple (set (tuple((e['a'],e['b'])) for e in u))
> (note: it is inefficient written this way though)
> -=- Olivier
> 2011/6/23 Neal Becker <email@example.com>
>> I have a set of experiments that I want to plot. There will be many plots.
>> Each will show different test conditions.
>> Suppose I put each of the test conditions and results into a recarray. The
>> recarray could be:
>> arr = np.empty ((#experiments,), dtype=[('x0',int), ('x1',int), ('y0',int)]
>> where x0,x1 are 2 test conditions, and y0 is a result.
>> First I want to group the plots such according to the test conditions. So,
>> want to first find what all the combinations of test conditions are.
>> Dunno if there is anything simpler than:
>> cases = tuple (set ((e['x0'], e['x1'])) for e in arr)
>> Next, need to select all those experiments which match each of these cases.
>> I know of no easy way.
>> Any suggestions? Perhaps I should look again at pytables?
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