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.. currentmodule:: cf
Constants of the :mod:`cf` module
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.. data:: cf.masked
The :attr:`cf.masked` constant allows data array values to be
masked by direct assignment. This is consistent with the
:ref:`behaviour of numpy masked arrays
<numpy:maskedarray.generic.constructing>`.
For example, masking every element of a field's data array could
be done as follows:
>>> f.subspace[...] = cf.masked
To mask every element of a field's data array whose value is less
than zero:
>>> f.where(cf.lt(0), cf.masked, i=True)
.. seealso:: `cf.Field.hardmask`, `cf.Field.subspace`,
`cf.Field.where`, `cf.lt`
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