commit 1d7f709e5bcc8bbc4ac70f9e1d56eb1744e81142
Author: = <=>
Date:   Mon Jul 9 09:21:21 2018 +0200

    Initial commit

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..68ddd4f
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.10)
+project(MatrixTests C)
+
+set(CMAKE_C_STANDARD 11)
+
+add_executable(MatrixTests main.c)
+target_link_libraries(MatrixTests m)
\ No newline at end of file
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..30ab6f2
--- /dev/null
+++ b/main.c
@@ -0,0 +1,159 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+
+float vectors_dot_prod(const float *x, const float *y, int n) {
+    float res = 0.0;
+    int i;
+    for (i = 0; i < n; i++) {
+        res += x[i] * y[i];
+    }
+    return res;
+}
+
+float** Make2DFloatArray(int arraySizeX, int arraySizeY) {
+    float** theArray;
+    theArray = (float**) malloc(arraySizeX*sizeof(float*));
+    for (int i = 0; i < arraySizeX; i++)
+        theArray[i] = (float*) malloc(arraySizeY*sizeof(float));
+    return theArray;
+}
+
+float calc_sigmoid(float x) {
+
+    return (1 / (1 + expf(-x)));
+}
+
+float sigmoid_deriv(float x) {
+    float sigmoid_computed = calc_sigmoid(x);
+    return sigmoid_computed * (1 - sigmoid_computed);
+}
+
+float* vector_matrix_prod(float **x, const float *y, int rows, int cols) {
+    int col, row;
+    float *result = (float *)malloc(cols * sizeof(float *));
+    float res;
+
+    for (col = 0; col < cols; col++) {
+        int column = col;
+        res = 0.0;
+        for (row = 0; row < rows; row++) {
+            res += y[row] * x[row][column];
+        }
+        result[column] = res;
+    }
+    return result;
+}
+
+void print_vector(float *x, int size) {
+    printf("Vector is\n");
+    for (int i = 0; i < size; i++) {
+        printf("%f\t", x[i]);
+    }
+    printf("\n\n");
+}
+
+void print_matrix(float **x, int rows, int cols) {
+    printf("Matrix is\n");
+
+    for (int row=0; row < rows; row++) {
+        for (int col=0; col < cols; col++) {
+            printf("%f\t", x[row][col]);
+        }
+        printf("\n");
+    }
+}
+
+float genRand()
+{
+    float num = ((float)rand()/(float)(RAND_MAX/2)) - 1;
+    return num;
+}
+
+float* create_starting_board() {
+    float* input = (float *)malloc(26 * sizeof(float *));
+    float tmp_input[26] = {0, 2, 0, 0, 0, 0, -5, 0, -3, 0, 0, 0, 5, -5, 0, 0, 0, 3, 0, 5, 0, 0, 0, 0, -2, 0};
+    for (int i=0; i < 26; i++) {
+        input[i] = tmp_input[i];
+    }
+    return input;
+}
+
+
+float* create_1D_layer(int size) {
+    float *input = (float *)malloc(size * sizeof(float *));
+
+    int i;
+    for (i=0; i<size; i++)
+        input[i] = 0.01;
+        //input[i] = genRand();
+
+    return input;
+}
+
+float** create_ND_layer(int rows, int cols) {
+    float** matrix = Make2DFloatArray(rows, cols);
+    for (int i=0; i<rows; i++) {
+        for (int j=0; j<cols; j++) {
+            matrix[i][j] = 0.4;
+            //matrix[i][j] = genRand();
+        }
+    }
+    return matrix;
+}
+
+
+float* perform_activation(float* res_vector, int size) {
+    float* activated_res = (float *)malloc(size * sizeof(float *));
+    for (int i=0; i < size; i++) {
+        activated_res[i] = calc_sigmoid(res_vector[i]);
+    }
+    return activated_res;
+}
+
+
+float feed_forward(float* input, float** hidden, float* output, int input_size, int hidden_size) {
+
+    float* hidden_res = vector_matrix_prod(hidden, input, input_size, hidden_size);
+    float* activated_res = perform_activation(hidden_res, hidden_size);
+
+    float output_res = vectors_dot_prod(activated_res, output, hidden_size);
+    float activated_output = calc_sigmoid(output_res);
+    return activated_output;
+
+}
+
+float TD_error(float expected, float actual) {
+    return expected - actual;
+}
+
+
+int main() {
+
+    srand((unsigned int) time(0));
+
+    clock_t begin = clock();
+    const int input_size = 26;
+    const int hidden_size = 40;
+    const int output_size = 1;
+
+    float* input_layer = create_starting_board();
+    float** hidden_layer = create_ND_layer(input_size, hidden_size);
+    float* output_layer = create_1D_layer(hidden_size);
+
+    float activated_output;
+    for (int i=0; i < 20000; i++) {
+         activated_output = feed_forward(input_layer, hidden_layer, output_layer, input_size, hidden_size);
+    }
+
+
+    // print_vector(input, input_size);
+    // print_matrix(matrix, input_size, hidden_size);
+    // print_vector(hidden_res, hidden_size);
+    // print_vector(output_layer, hidden_size);
+
+    clock_t end = clock();
+    double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
+    printf("\nSpent %f time\nand the final result is %f",time_spent, activated_output);
+}