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ex1G_dense_matrices_access/DenseMatrix.h

@@ -0,0 +1,71 @@
+#pragma once
+#include "sigmoid.h"
+#include <iostream>
+#include <vector>
+using namespace std;
+
+class DenseMatrix
+{
+    private:
+        vector<double> M;
+        size_t n;
+        size_t m;
+
+
+    public:
+        vector<double> Mult(const vector<double> &x) const
+        {
+            vector<double> y(n,0);
+            for(size_t i = 0; i < n; ++i)   // iterate row
+            {
+                for(size_t j = 0; j < m; ++j)   // iterate column
+                {
+                    y[i] += M[i*m + j]*x[j];
+                }
+            }
+            return y;
+        }
+
+        vector<double> MultT(const vector<double> &y) const
+        {
+            vector<double> x(m,0);
+            for(size_t j = 0; j < m; ++j)   // iterate column
+            {
+                for(size_t i = 0; i < n; ++i)   // iterate row
+                {
+                    x[j] += M[i*m + j]*y[i];
+                }
+            }
+            return x;
+        }
+
+        void Print() const
+        {
+            for(size_t i = 0; i < n; ++i)   // iterate row
+            {
+                for(size_t j = 0; j < m; ++j)   // iterate column
+                {
+                    cout << M[i*m + j] << "  ";
+                }
+                cout << endl;
+            }
+            cout << endl;
+        }
+
+
+        DenseMatrix(size_t n, size_t m)
+        {
+            this->n = n;
+            this->m = m;
+            M = vector<double>(n*m);
+            size_t nm = max(n,m);
+
+            for(size_t i = 0; i < n; ++i)   // iterate row
+            {
+                for(size_t j = 0; j < m; ++j)   // iterate column
+                {
+                    M[i*m + j] = sigmoid(x_entry(i,nm))*sigmoid(x_entry(j,nm));
+                }
+            }
+        }
+};