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Implemented matrix multiplication

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This commit is contained in:
Ziver Koc 2017-12-03 18:04:52 +01:00
parent 0e664ba3ca
commit 9562d8615a
2 changed files with 132 additions and 46 deletions
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34
test/zutil/math/MatrixMathTest.java
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@ -47,15 +47,37 @@ public class MatrixMathTest {
MatrixMath.subtract(new double[][]{{2,3},{-4,9}}, new double[][]{{1,2},{3,4}}));
}
@Test
public void elementalMultiply(){
assertArrayEquals(new double[][]{{2,6},{-12,36}},
MatrixMath.multiply(new double[][]{{2,3},{-4,9}}, new double[][]{{1,2},{3,4}}));
public void vectorMultiply(){
assertArrayEquals(
new double[]{8,14},
MatrixMath.multiply(new double[][]{{2,3},{-4,9}}, new double[]{1,2}),
0.0
);
}
@Test
public void elementalDivision(){
assertArrayEquals(new double[][]{{2,2},{-3,3}},
MatrixMath.divide(new double[][]{{2,4},{-9,12}}, new double[][]{{1,2},{3,4}}));
public void vectorDivision(){
assertArrayEquals(
new double[]{4,1},
MatrixMath.divide(new double[][]{{2,4},{-4,10}}, new double[]{1,2}),
0.0
);
}
@Test
public void matrixMultiply(){
assertArrayEquals(
new double[][]{{486,410.4,691.6},{314,341.6,416.4},{343.5,353.4,463.6},{173,285.2,190.8}},
MatrixMath.multiply(
new double[][]{{1,2104},{1,1416},{1,1534},{1,852}},
new double[][]{{-40,200,-150},{0.25,0.1,0.4}})
);
}
}