weibozhao commented on a change in pull request #24:
URL: https://github.com/apache/flink-ml/pull/24#discussion_r768301239
##########
File path: flink-ml-core/src/main/java/org/apache/flink/ml/linalg/BLAS.java
##########
@@ -52,4 +52,37 @@ public static double norm2(DenseVector x) {
public static void scal(double a, DenseVector x) {
JAVA_BLAS.dscal(x.size(), a, x.values, 1);
}
-}
+
+ /**
+ * y = alpha * matrix * x + beta * y or y = alpha * (matrix^T) * x + beta
* y.
+ *
+ * @param matrix m x n matrix.
+ * @param transMatrix Whether transposes matrix before multiply.
+ * @param x dense vector with size n.
+ * @param y dense vector with size m.
+ */
+ public static void gemv(
+ double alpha,
+ DenseMatrix matrix,
+ boolean transMatrix,
+ DenseVector x,
+ double beta,
+ DenseVector y) {
+ Preconditions.checkArgument(
Review comment:
OK
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