Hi,
Suppose I have an array 'd'
In [75]: d
Out[75]:
array(['parrot', 'parrot', 'dog', 'cat', 'parrot', 'dog', 'parrot',
'cat',
'dog', 'dog', 'dog', 'cat', 'cat', 'dog', 'cat', 'parrot',
'cat',
'cat', 'dog', 'parrot', 'parrot', 'parrot', 'cat', 'dog',
'parrot',
'dog', 'dog', 'dog', 'dog', 'parrot', 'parrot', 'cat', 'dog',
'parrot', 'cat', 'parrot', 'cat', 'dog', 'parrot', 'cat',
'parrot',
'cat', 'parrot', 'parrot', 'parrot', 'parrot', 'dog', 'cat',
'parrot', 'cat'],
dtype='|S6')
I'd like to map every unique element (these could be strings, objects,
or already ints) to a unique integer between 0 and len(unique(d)) - 1.
The solution I've come up with is
In [76]: uniqueind, vectorind = (d == unique(d)[:, newaxis]).nonzero()
In [77]: myints = uniqueind[argsort(vectorind)]
But I wonder if there's a better way to do this. Anyone ever run into
this problem before?
David
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