Add matrix transposition to exponentiation operator.

src/main/java/ee/ut/cs/gitlab/maikov/expressions/MathOp.java

@@ -9,5 +9,6 @@ public interface MathOp {
     // For a matrix it is a determinant
     Value absoluteValue();
 
+    // For matrix, if it is not finite then do matrix transposition.
     Value exponentiation(Value other);
 }

src/main/java/ee/ut/cs/gitlab/maikov/expressions/MatrixTranspose.java

@@ -3,6 +3,8 @@ package ee.ut.cs.gitlab.maikov.expressions;
 import ee.ut.cs.gitlab.maikov.exceptions.InvalidReductionException;
 import ee.ut.cs.gitlab.maikov.matrix.Matrix;
 
+// Use Exponentiation with NaN as the power.
+@Deprecated
 public class MatrixTranspose extends Expression {
     private final Expression expr;
 

src/main/java/ee/ut/cs/gitlab/maikov/expressions/MatrixValue.java

@@ -88,20 +88,25 @@ public class MatrixValue extends Value {
     @Override
     public Value exponentiation(Value other) {
         if (other instanceof Number otherNumber) {
-            SquareMatrix squareMatrix = getSquareMatrix();
-            int n = (int) otherNumber.getNumber();
-            if (n == 0) {
-                squareMatrix.identity();
-                return new MatrixValue(squareMatrix);
-            } else if (n < 0) {
-                return new MatrixValue(InverseMatrix.compute(squareMatrix)).exponentiation(new Number(-n));
-            } else {
-                Matrix result = Matrix.clone(this.getMatrix());
-                for (int i = 1; i < n; i++) {
-                    result.multiply(this.getMatrix());
+            if (Double.isFinite(otherNumber.getNumber())) {
+                SquareMatrix squareMatrix = getSquareMatrix();
+                int n = (int) otherNumber.getNumber();
+                if (n == 0) {
+                    squareMatrix.identity();
+                    return new MatrixValue(squareMatrix);
+                } else if (n < 0) {
+                    return new MatrixValue(InverseMatrix.compute(squareMatrix)).exponentiation(new Number(-n));
+                } else {
+                    Matrix result = Matrix.clone(this.getMatrix());
+                    for (int i = 1; i < n; i++) {
+                        result.multiply(this.getMatrix());
+                    }
+                    return new MatrixValue(result);
                 }
-                return new MatrixValue(result);
+            } else {
+                return new MatrixValue(this.matrix.transpose());
             }
+
         } else {
             throw new InvalidOperandException("Ei saa astendada maatriksit maatriksiga või millegi muuga.");
         }

src/test/java/ExpressionTest.java

@@ -146,7 +146,7 @@ public class ExpressionTest {
                 5, 6, 7, 8,
                 9, 10, 11, 12,
         });
-        Expression expr = new MatrixTranspose(new MatrixValue(a));
+        Expression expr = new Exponentiation(new MatrixValue(a), new Number(Double.NaN));
         Expression result = expr.compute();
         assertInstanceOf(MatrixValue.class, result);
         MatrixValue value = (MatrixValue) result;
@@ -174,7 +174,7 @@ public class ExpressionTest {
                 0, 8, 6,
                 1, 19, 12,
         });
-        Expression expr = new MatrixTranspose(new Multiplication(new MatrixValue(a), new MatrixValue(b)));
+        Expression expr = new Exponentiation(new Multiplication(new MatrixValue(a), new MatrixValue(b)), new Number(Double.NaN));
         Expression result = expr.compute();
         assertInstanceOf(MatrixValue.class, result);
         MatrixValue value = (MatrixValue) result;