Good SVD from MathNet

LinearAlgebra/Matrix.cs

@@ -8,6 +8,14 @@ public class Matrix {
         this.cols = cols;
     }
 
+    public static float[,] Diagonal(float[] v) {
+        float[,] r = new float[v.Length, v.Length];
+        for (int i = 0; i < v.Length; i++) {
+            r[i, i] = v[i];
+        }
+        return r;
+    }
+
     public static float[,] Transpose(float[,] m) {
         int rows = m.GetLength(0);
         int cols = m.GetLength(1);
@@ -31,14 +39,15 @@ public class Matrix {
         if (n != matrix.GetLength(1))
             throw new System.ArgumentException("Matrix must be square.");
 
-        if (n == 1) return matrix[0, 0]; // Base case for 1x1 matrix
+        if (n == 1)
+            return matrix[0, 0]; // Base case for 1x1 matrix
+
         if (n == 2) // Base case for 2x2 matrix
             return matrix[0, 0] * matrix[1, 1] - matrix[0, 1] * matrix[1, 0];
 
         float det = 0;
-        for (int col = 0; col < n; col++) {
+        for (int col = 0; col < n; col++)
             det += (col % 2 == 0 ? 1 : -1) * matrix[0, col] * Determinant(Minor(matrix, 0, col));
-        }
 
         return det;
     }