Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/5355#discussion_r28042928
--- Diff: python/pyspark/mllib/linalg.py ---
@@ -687,6 +702,100 @@ def __eq__(self, other):
all(self.values == other.values))
+class SparseMatrix(object):
+ """Sparse Matrix stored in CSC format."""
+ def __init__(self, numRows, numCols, colPtrs, rowIndices, values,
+ isTransposed=False):
+ self.numRows = numRows
+ self.numCols = numCols
+ self.isTransposed = isTransposed
+ if isinstance(colPtrs, basestring):
+ self.colPtrs = np.frombuffer(colPtrs, dtype=np.uint64)
+ else:
+ self.colPtrs = np.asarray(colPtrs, dtype=np.uint64)
+
+ if self.isTransposed and self.colPtrs.size != numRows + 1:
+ raise ValueError("Expected colPtrs of size %d, got %d."
+ % (numRows + 1, self.colPtrs.size))
+ elif not self.isTransposed and self.colPtrs.size != numCols + 1:
+ raise ValueError("Expected colPtrs of size %d, got %d."
+ % (numCols + 1, self.colPtrs.size))
+ if isinstance(rowIndices, basestring):
+ self.rowIndices = np.frombuffer(rowIndices, dtype=np.uint64)
+ else:
+ self.rowIndices = np.asarray(rowIndices, dtype=np.uint64)
+ if isinstance(values, basestring):
+ self.values = np.frombuffer(values, dtype=np.float64)
+ else:
+ self.values = np.asarray(values, dtype=np.float64)
+
--- End diff --
check the lengths of rowIndices and values are equal.
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