feature-selection - XGBoost: xgb.importance 機能マップ

Question

次のコードを使用しようとすると、次のエラーが発生します。

******コード******

    importance = bst.get_fscore(fmap='xgb.fmap')
    importance = sorted(importance.items(), key=operator.itemgetter(1))

******エラー******

  File "scripts/xgboost_bnp.py", line 225, in <module>
  importance = bst.get_fscore(fmap='xgb.fmap')
  File "/usr/lib/python2.7/site-packages/xgboost/core.py", line 754, in get_fscore
    trees = self.get_dump(fmap)
  File "/usr/lib/python2.7/site-packages/xgboost/core.py", line 740, in get_dump
   ctypes.byref(sarr)))
  File "/usr/lib/python2.7/site-packages/xgboost/core.py", line 92, in _check_call
raise XGBoostError(_LIB.XGBGetLastError())
xgboost.core.XGBoostError: can not open file "xgb.fmap"