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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