Added matrix transpose

src/zutil/math/MatrixMath.java

@@ -189,6 +189,20 @@ public class MatrixMath {
         return result;
     }
 
+    /**
+     * @return a new matrix with the transpose of the input matrix.
+     */
+    public static double[][] transpose(double[][] matrix){
+        double[][] result = new double[matrix[0].length][matrix.length];
+
+        for (int y=0; y < result.length; ++y) {
+            for (int x=0; x < result[y].length; ++x){
+                result[y][x] = matrix[x][y];
+            }
+        }
+        return result;
+    }
+
 
     private static void matrixPreCheck(double[][] matrix1, double[][] matrix2) {
         if (matrix1[0].length != matrix2.length)
@@ -212,4 +226,5 @@ public class MatrixMath {
         }
         return result;
     }
+
 }

test/zutil/math/MatrixMathTest.java

@@ -79,6 +79,15 @@ public class MatrixMathTest {
         );
     }
 
+    @Test
+    public void matrixTranspose(){
+        assertArrayEquals(
+                new double[][]{{1,3},{2,5},{0,9}},
+                MatrixMath.transpose(
+                        new double[][]{{1,2,0},{3,5,9}})
+        );
+    }
+
 
 
     @Test