Hi Everyone,
I am finding that numpy cannot operate on boolean arrays. For example,
the following does not work:
x=3Darray([(1,2),(2,1),(3,1),(4,1)])
x[x[:,0]>x[:,1] and x[1:]>1,:]
It gives me an syntax error:
-------------------
Traceback (most recent call last):
File "<pyshell#74>", line 1, in <module>
x[x[:,0]>x[:,1] and x[1:]>1,:]
ValueError: The truth value of an array with more than one element is
ambiguous. Use a.any() or a.all()
-------------------
However, this is not what I want. I want a "piece-wise" "AND" operation
on the two boolean vectors. In other words, the row is selected if both
are true. How do I accomplish this?
Many thanks,
Geoffrey
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