Merge pull request #7746 from stuartarchibald/wip/np_la_lstsq_doc_fix

charris · web-flow · commit 0b3a7d90c4d3 · 2016-06-15T08:23:51.000-06:00
DOC: Clarify the effect of rcond in numpy.linalg.lstsq.
diff --git a/numpy/linalg/linalg.py b/numpy/linalg/linalg.py
@@ -1804,8 +1804,9 @@ def lstsq(a, b, rcond=-1):
         of `b`.
     rcond : float, optional
         Cut-off ratio for small singular values of `a`.
-        Singular values are set to zero if they are smaller than `rcond`
-        times the largest singular value of `a`.
+        For the purposes of rank determination, singular values are treated
+        as zero if they are smaller than `rcond` times the largest singular
+        value of `a`.
 
     Returns
     -------
