diff options
Diffstat (limited to 'mllib/src')
| -rw-r--r-- | mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala index 1a0073c9d4..695e03b736 100644 --- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala +++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala @@ -347,6 +347,8 @@ class RowMatrix( * The principal components are stored a local matrix of size n-by-k. * Each column corresponds for one principal component, * and the columns are in descending order of component variance. + * The row data do not need to be "centered" first; it is not necessary for + * the mean of each column to be 0. * * @param k number of top principal components. * @return a matrix of size n-by-k, whose columns are principal components |