Sum of elements below main diagonal of matrix: Difference between revisions
Sum of elements below main diagonal of matrix (view source)
Revision as of 22:18, 11 September 2021
, 2 years ago→{{header|MiniZinc}}
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sum(tril(A, -1)) = 69
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=={{header|Mathematica}}/{{header|Wolfram Language}}==
<lang Mathematica>m = {{1, 3, 7, 8, 10}, {2, 4, 16, 14, 4}, {3, 1, 9, 18, 11}, {12, 14, 17, 18, 20}, {7, 1, 3, 9, 5}};
Total[LowerTriangularize[m, -1], 2]</lang>
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<pre>69</pre>
=={{header|MiniZinc}}==
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=={{header|Nim}}==
We use a generic definition for the square matrix type. The compiler insures that the matrix we provide is actually square.
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