Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/2294#discussion_r17709089
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
---
@@ -83,6 +219,24 @@ object Matrices {
}
/**
+ * Creates a column-majored sparse matrix in Compressed Sparse Column
(CSC) format.
+ *
+ * @param numRows number of rows
+ * @param numCols number of columns
+ * @param colPointers the index corresponding to the start of a new
column
+ * @param rowIndices the row index of the entry
+ * @param values non-zero matrix entries in column major
+ */
+ def sparse(
+ numRows: Int,
+ numCols: Int,
+ colPointers: Array[Int],
--- End diff --
`colPtrs`
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