[doc] Some notes for external memory. (#5065)

2019-11-26 00:22:02 +08:00
parent d667ea9335
commit 9f52e834dc
3 changed files with 18 additions and 11 deletions
--- a/doc/python/python_intro.rst
+++ b/doc/python/python_intro.rst
@@ -54,7 +54,7 @@ The data is stored in a :py:class:`DMatrix <xgboost.DMatrix>` object.
  .. note:: Categorical features not supported

    Note that XGBoost does not provide specialization for categorical features; if your data contains
-    categorical features, load it as a NumPy array first and then perform
+    categorical features, load it as a NumPy array first and then perform corresponding preprocessing steps like
    `one-hot encoding <http://scikit-learn.org/stable/modules/generated/sklearn.preprocessing.OneHotEncoder.html>`_.

  .. note:: Use Pandas to load CSV files with headers