SW_Project/MatrixAndVectorOps.c at master · royetadmor/SW_Project · GitHub

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#include "MatrixAndVectorOps.h"
#include <math.h>
#include <stdio.h>
#include <time.h>
#include <stdlib.h>


double* multiplyMatrixAndVector(double** matrix, double* vector, double* newVector, int length){
    int i,j;
    double sum;
    for(i = 0 ; i < length; i++){
        sum = 0;
        for(j = 0 ; j < length; j++){
            sum += (matrix[i][j]*vector[j]);
        }
        newVector[i] = sum;
    }
    return newVector;
}


void normalizeVector(int length, double *vector){
    int i;
    long double	sum = 0;
    for(i = 0; i < length; i++){
        sum += vector[i]*vector[i];
    }
    sum = sqrt(sum);
    for(i = 0; i < length; i++){
        vector[i] = vector[i]/sum;
    }
}


double MultiplyVectorAndVector(double* vector1, double* vector2, int length)
{
    double sum = 0;
    int i;
    for (i = 0; i < length; ++i) {
        sum += vector1[i]*vector2[i];
    }
    return sum;
}


void printVector(int length, double *vector){
    int i;
    for(i = 0; i < length; i++){
        printf("%15.10f ",vector[i]);
    }
    printf("\n");
}


double* generateRandomVector(int length){
    int i;
    double* vectorToReturn = (double*)malloc(sizeof(double)*length);
    srand(time(NULL));
    for(i = 0 ; i < length; i++){
        vectorToReturn[i] = rand();
    }
    return vectorToReturn;
}


void printIntMat(int **mat, int length){
	int i = 0 , j = 0;
	printf("%6d ",-1);
	for(;i < length; i++){
		printf("%6d ",i);
	}
	printf("\n");
	i = 0;
	for (; i < length; i++){
		printf("%6d ",i);
		for(; j < length; j++){
			printf("%6d ",*(*(mat + i)+j) );
		}
		j = 0;
		printf("\n");
	}
	i = 0;
}


void printDoubleMat(double **mat, int length){
	int i = 0 , j = 0;
	printf("%6d ",-1);
	for(;i < length; i++){
		printf("%6d ",i);
	}
	printf("\n");
	i = 0;
	for (; i < length; i++){
		printf("%6d ",i);
		for(; j < length; j++){
			printf("%+.3f ",*(*(mat + i)+j) );
		}
		j = 0;
		printf("\n");
	}
	i = 0;
}


void printIntVector(int length, int *vector){
    int i;
    for(i = 0; i < length; i++){
        printf("%6d ",vector[i]);
    }
    printf("\n");
}

void freeDoubleMatrix(double** matrix, int length)
{
    int i;
    for (i = 0; i < length; ++i) {
        free(matrix[i]);
    }
    free(matrix);
}

void freeIntMatrix(int** matrix, int length)
{
    int i;
    for (i = 0; i < length; ++i) {
        free(matrix[i]);
    }
    free(matrix);
}