[Numpy-discussion] how to combine (stack) two masked arrays?
Thu Mar 1 16:28:21 CST 2007
The simplest is:
But for this particular kind of operation, I don't think that you need masked
array at all: this could do the trick
>>>rescaled = clipped.copy()
>>>inside = numpy.logical_and(clipped>=123, clipped<=354)
>>>outside = numpy.logical_not(inside)
>>>newrescaled[inside] = 5*clipped[inside]
>>>newrescaled[outside] = clipped[outside]
A side note: when using numpy.core.ma, it's more efficient to deal w/ the
_data and _mask parts separately than at once.
You may want to try an alternative implementation of maskedarray, available in
the sandbox of the scipy SVN. I'd be very happy to have your feedback
Let me know if this helps
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