[SYSTEMDS-3783] Fix wsigmoid rewrite test setup

The recent addition of various rewrite tests for code coverage left a
FIXME on the wsigmoid test which gave incorrect results for all
variants without transpose. After double checking, it turns out the
test setup was wrong in the assumptions when the rewrite should apply
(missing transpose) and how the shapes of involved matrices look like.

src/test/java/org/apache/sysds/test/functions/rewrite/RewriteSimplifyWeightedSigmoidMMChainsTest.java

@@ -19,7 +19,10 @@
 
 package org.apache.sysds.test.functions.rewrite;
 
+import java.util.HashMap;
+
 import org.apache.sysds.hops.OptimizerUtils;
+import org.apache.sysds.runtime.matrix.data.MatrixValue;
 import org.apache.sysds.test.AutomatedTestBase;
 import org.apache.sysds.test.TestConfiguration;
 import org.apache.sysds.test.TestUtils;
@@ -32,9 +35,8 @@ public class RewriteSimplifyWeightedSigmoidMMChainsTest extends AutomatedTestBas
 	private static final String TEST_CLASS_DIR =
 		TEST_DIR + RewriteSimplifyWeightedSigmoidMMChainsTest.class.getSimpleName() + "/";
 
-	private static final int rows = 100;
+	private static final int rows = 150;
 	private static final int cols = 100;
-	//private static final double eps = Math.pow(10, -10);
 
 	@Override
 	public void setUp() {
@@ -125,8 +127,9 @@ private void testRewriteSimplifyWeightedSigmoidMMChains(int ID, boolean rewrites
 			OptimizerUtils.ALLOW_OPERATOR_FUSION = rewrites;
 
 			//create matrices
-			double[][] X = getRandomMatrix(rows, cols, -1, 1, 0.80d, 3);
-			double[][] Y = getRandomMatrix(rows, cols, -1, 1, 0.70d, 4);
+			int rank = 50;
+			double[][] X = getRandomMatrix(cols, rank, -1, 1, 0.80d, 3);
+			double[][] Y = getRandomMatrix(rows, rank, -1, 1, 0.70d, 4);
 			double[][] W = getRandomMatrix(rows, cols, -1, 1, 0.60d, 5);
 			writeInputMatrixWithMTD("X", X, true);
 			writeInputMatrixWithMTD("Y", Y, true);
@@ -136,10 +139,9 @@ private void testRewriteSimplifyWeightedSigmoidMMChains(int ID, boolean rewrites
 			runRScript(true);
 
 			//compare matrices
-			// FIXME
-			// HashMap<MatrixValue.CellIndex, Double> dmlfile = readDMLMatrixFromOutputDir("R");
-			// HashMap<MatrixValue.CellIndex, Double> rfile = readRMatrixFromExpectedDir("R");
-			// compareMatrices(dmlfile, rfile, eps, "Stat-DML", "Stat-R");
+			HashMap<MatrixValue.CellIndex, Double> dmlfile = readDMLMatrixFromOutputDir("R");
+			HashMap<MatrixValue.CellIndex, Double> rfile = readRMatrixFromExpectedDir("R");
+			TestUtils.compareMatrices(dmlfile, rfile, 1e-8, "Stat-DML", "Stat-R");
 
 			if(rewrites)
 				Assert.assertTrue(heavyHittersContainsString("wsigmoid"));

src/test/scripts/functions/rewrite/RewriteSimplifyWeightedSigmoidMMChains.dml

@@ -25,6 +25,8 @@ Y = read($2)
 W = read($3)
 type = $4
 
+if( type > 4 )
+  X = t(X);
 
 # Perform operations
 if(type == 1){