3 examples of 'sum all elements in matrix python' in Python

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402def sum(self, axis=None, dtype=None, out=None):
403 """
404 Returns the sum of the matrix elements, along the given axis.
405
406 Refer to `numpy.sum` for full documentation.
407
408 See Also
409 --------
410 numpy.sum
411
412 Notes
413 -----
414 This is the same as `ndarray.sum`, except that where an `ndarray` would
415 be returned, a `matrix` object is returned instead.
416
417 Examples
418 --------
419 >>> x = np.matrix([[1, 2], [4, 3]])
420 >>> x.sum()
421 10
422 >>> x.sum(axis=1)
423 matrix([[3],
424 [7]])
425 >>> x.sum(axis=1, dtype='float')
426 matrix([[ 3.],
427 [ 7.]])
428 >>> out = np.zeros((1, 2), dtype='float')
429 >>> x.sum(axis=1, dtype='float', out=out)
430 matrix([[ 3.],
431 [ 7.]])
432
433 """
434 return N.ndarray.sum(self, axis, dtype, out)._align(axis)
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6@jit(native=True, xsimd=True)
7def row_sum(arr, columns):
8 return arr.T[columns].sum(0)
52def sum(l):
53 return reduce(operator.add, l)

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