walterddr commented on a change in pull request #9732: [FLINK-14153][ml] Add to
BLAS a method that performs DenseMatrix and SparseVector multiplication.
URL: https://github.com/apache/flink/pull/9732#discussion_r336313420
##########
File path:
flink-ml-parent/flink-ml-lib/src/main/java/org/apache/flink/ml/common/linalg/BLAS.java
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@@ -146,4 +148,38 @@ public static void gemv(double alpha, DenseMatrix matA,
boolean transA,
final String ta = transA ? "T" : "N";
NATIVE_BLAS.dgemv(ta, m, n, alpha, matA.getData(), lda,
x.getData(), 1, beta, y.getData(), 1);
}
+
+ /**
+ * y := alpha * A * x + beta * y .
+ */
+ public static void gemv(double alpha, DenseMatrix matA, boolean transA,
+ SparseVector x, double
beta, DenseVector y) {
+ if (transA) {
Review comment:
Can we create a `transposePreconditionChecker`? feel like this would be use
multiple place/times with duplicate code in such as `gemv`, `gemm`, etc.
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