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ex1G_dense_matrices_access/ProductMatrix.h

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+#pragma once
+#include <cmath>
+#include <iostream>
+#include <vector>
+using namespace std;
+
+class ProductMatrix
+{
+    private:
+        vector<double> u;
+        vector<double> v;
+        size_t n;
+        size_t m;
+
+    public:
+        vector<double> Mult(const vector<double> &x) const
+        {
+            vector<double> y(n,0);
+            for(int i = 0; i < n; ++i)
+            {
+                for(int j = 0; j < m; ++j)
+                {
+                    y[i] += v[j]*x[j];
+                }
+                y[i] *= u[i];
+            }
+            return y;
+        }
+
+        vector<double> MultT(const vector<double> &y) const
+        {
+            vector<double> x(m,0);
+            for(int j = 0; j < m; ++j)
+            {
+                for(int i = 0; i < n; ++i)
+                {
+                    x[j] += y[i]*u[i];
+                }
+                x[j] *= v[j];
+            }
+            return x;
+        }
+
+        ProductMatrix(const vector<double> &u, const vector<double> &v)
+        {
+            n = u.size();
+            m = v.size();
+            this->u = u;
+            this->v = v;
+            
+        }
+};