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numpy.ma.MaskedArray.trace
method
MaskedArray.trace(offset=0, axis1=0, axis2=1, dtype=None, out=None)[source]- 
    
Return the sum along diagonals of the array.
Refer to
numpy.tracefor full documentation.See also
numpy.trace- equivalent function
 
 
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Licensed under the 3-clause BSD License.
 https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.ma.MaskedArray.trace.html