add median of matrix (#9363)

* add median of matrix

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* update

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* fix formating

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* Apply suggestions from code review

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <[email protected]>