alpha & lambda for gbtree

alpha & lambda descriptions to "Parameters for Tree Booster" added (issue #466)
2015-09-05 12:36:42 +02:00 · 2015-09-05 12:36:42 +02:00 · dbc5c9b82d
commit dbc5c9b82d
parent 3d6c831e8a
1 changed files with 4 additions and 0 deletions
--- a/doc/parameter.md
+++ b/doc/parameter.md
@ -46,6 +46,10 @@ Parameters for Tree Booster
 * colsample_bytree [default=1]
  - subsample ratio of columns when constructing each tree.
  - range: (0,1]
+* lambda [default=0]
+  - L2 regularization term on weights
+* alpha [default=0]
+  - L1 regularization term on weights

 Parameters for Linear Booster
 -----------------------------