<p dir="auto">Apparently there isn't any narrative documentations for some non-clustering metrics as it was pointed in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="9619027" data-permission-text="Title is private" data-url="https://github.com/scikit-learn/scikit-learn/issues/1507" data-hovercard-type="pull_request" data-hovercard-url="/scikit-learn/scikit-learn/pull/1507/hovercard" href="https://github.com/scikit-learn/scikit-learn/pull/1507">#1507</a>.</p>
<p dir="auto">There is no user guide on the classification / regression metrics....</p>