MaskedArray.fill_value Filling value.
MaskedArray.recordmask Return the mask of the records. A record is masked when all the fields are masked
numpy.ma.polyfit(x, y, deg, rcond=None, full=False, w=None, cov=False)
numpy.ma.ones(shape, dtype=None, order='C') = Return a new array of given shape and type, filled with ones.
numpy.ma.make_mask_none(newshape, dtype=None)
numpy.ma.masked_not_equal(x, value, copy=True)
numpy.ma.masked_greater(x, value, copy=True)
MaskedArray.soften_mask()
numpy.ma.allequal(a, b, fill_value=True)
numpy.ma.getmaskarray(arr)
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