[SciPy-user] iteratively masking timeseries
Fri Jun 13 18:23:46 CDT 2008
On Thursday 12 June 2008 17:14:03 Tim Michelsen wrote:
> Does that mean that one can only mask an array once and cannot mask more
> values later on?
No no, the message
> IndexError: Masked arrays must be filled before they can be used as
doesn't mean you can't mask arrays more than once, just that you can't use a
MaskedArray as index in a TimeSeries without having to fill it first. The
reason for this behavior is that we can't tell beforehand how you want to
deal with your masked values: should a masked value be considered True ?
So, when you want to do something like:
> mask[mask<0] = numpy.ma.masked
mask[(mask<0).filled(True)] = numpy.ma.masked
That way, you're masking the values of mask that are negative, and keep the
masked values as masked.
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