small error in algo

mroeschke · mroeschke · commit 6a54fafea48d · 2017-01-05T00:16:46.000-08:00
diff --git a/pandas/src/algos_groupby_helper.pxi.in b/pandas/src/algos_groupby_helper.pxi.in
@@ -698,7 +698,7 @@ def group_cummin(numeric[:, :] out,
                     elif val < accum[lab, j]:
                         min_val = val
                     accum[lab, j] = min_val
-                    out[i, j] = min_val
+                    out[i, j] = accum[lab, j]
 
 
 @cython.boundscheck(False)
