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filterMARP.c

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+
+
+
+//ALGORITHM 6 
+//p_1 is period 1, p_2 is period 2 in no. of iterations 
+float** filterMARP(int** A, float* x, float e, int max_iterations, float a, int p_1, int p_2, int size){
+	
+	float* x_new, x_c, y;
+	int count = 0;
+	float norm = 1.0;
+	int* N, C, N_new, C_new;
+	int** Ann, Acn;
+	int i;
+	/*********** ...malloc... *************/
+	x_new = malloc(size*sizeof(float));
+	
+	x_c = malloc(size*sizeof(float));
+	y = malloc(size*sizeof(float));
+	N = malloc(size*sizeof(int));
+	C = malloc(size*sizeof(int));
+	N_new = malloc(size*sizeof(int));
+	C_new = malloc(size*sizeof(int));
+	Ann = malloc(size*sizeof(int *));
+	for(i=0; i<size; i++){
+		Ann[i] = malloc(size*sizeof(int));
+	}
+	Acn = malloc(size*sizeof(int *));
+	for(i=0; i<size; i++){
+		Acn[i] = malloc(size*sizeof(int));
+	}
+	
+	/******************* start iterations ********************/
+	while(count<max_iterations && norm<e){
+		if(count == 0){
+			gauss_Seidel(x, x_new, A, NULL, NULL, a, size);
+		}
+		else{
+			gauss_Seidel(x, x_new, Ann, Acn, x_c, a, size);
+		}
+	
+		count++;
+		if(count%p_1==0){
+			N = N_new; //might not be needed
+			C = C_new;
+			detect_Converged(N_new, C_new, x_new, x, e); //sinthiki stin prwti selida toy prwtou kefalaiou
+			filterA(A, Ann, Acn, C_new, N_new, size);             //
+			y =  compy(Acn, x, size);//Acn*x ;
+			x_c = filterx(x_new, C, size);
+		}
+		if(count%p_2==0){
+			norm = comp_norm(x_new, A); //||A*x - x||
+		}
+		x = x_new;
+	}
+	return x_new;
+}
+
+float* compy(int** Acn, float* x, int size){ //Acn*x  pollaplasiasmos
+	float* y;
+	
+}
+
+void filterA(int** A, int** Ann, int** Acn, int* C_new, int* N_new, int size){
+	int i,j;
+	for(i=0; i<size; i++){
+		if(C_new[i] == 1){
+			for(j = 0; j<size;j++){
+				Ann[i][j] = 0;    //sxesi 10 sto pdf
+			}
+		}
+		else{
+			for(j = 0; j<size;j++){
+				Ann[i][j] = A[i][j];    //sxesi 10 sto pdf
+			}
+		}
+	}
+	
+	
+	//Acn part
+}
+
+float* filterx(float* xnew, int* C_new, int size){
+	int i,j;
+	float *x_c;
+	x_c = malloc(size*sizeof(float));
+	for(i=0; i<size; i++){
+		if(C_new[i] == 1){
+			x_c[i] = x[i];
+		}
+		else{
+			x_c[i] = 0;
+		}
+	}
+	return x_c;
+}
+
+void gauss_Seidel(float* x, float* x_new, int** Ann, int** Acn, float* x_c, float* y, float a, int size){
+	int i, j;
+	float sum1 = 0;
+	float sum2 = 0;
+	x_new = x; //giati ston algorithmo leei most updated values na xrisimopoiountai gia to sum1
+	if(Acn == NULL && x_c == NULL){
+		
+		for(i=0; i<size; i++){
+			for(j=0;j<i;j++){
+				sum1 += Ann[i][j]*x_new[j]; //einai o pinakas A afou einai i prwti epanalipsi
+			}
+			for(j=i;j<size;j++){
+				sum2 += Ann[i][j]*x[j];
+			}
+			x_new[i] = (1-a)+a*sum1+a*sum2;
+		}
+	}
+	else{
+		
+		for(i=0; i<size; i++){
+			for(j=0;j<i;j++){
+				sum1 += Ann[i][j]*x_new[j];
+			}
+			for(j=i;j<size;j++){
+				sum2 += Ann[i][j]*x[j];
+			}
+			
+			x_new[i] = (1-a)+a*sum1+a*sum2+y[i]+x_c[i];
+		}
+		
+	}
+
+}
+
+/*#include <stdio.h> 
+#include <stdlib.h>
+
+
+void main(){
+	printf("Hello I am maria \n");
+	
+	//Read from file of adjacency matrix
+	FILE *adjm;
+	
+	int x;
+	adjm = fopen("adj_matrix.txt", "r+");
+	if(!adjm){
+		printf("Error opening file \n");
+		exit(0);
+	}
+	
+	//Read dimensions of file (square)
+	int m, count=0;
+	while((m=fgetc(adjm))) {
+		// break if end of file 
+		if(m == EOF) break;
+		// otherwise add one to the count of that particular character 
+		if(m=='\n'){
+			count+=1;
+		}
+    }
+	printf("Line count of matrix is %d \n", count);
+	int d = count;
+	int i,j;
+	
+	// Put values in matrix A
+	int** A = malloc(d*sizeof(int *));
+	for( i=0; i<d ; i++){
+		A[i] = malloc(d*sizeof(int));
+	}
+	for( i=0; i<d ; i++){
+		for(j=0 ; j<d; j++){
+			if(!fscanf(adjm, "%d ", &A[i][j])){
+				break;
+			}
+			//printf("A[%d][%d] = %d", i , j, A[i][j]);
+		}
+	}
+	fclose(adjm);
+	printf(" First val is %d Last val is %d \n", A[0][0], A[d-1][d-1]);
+	
+	//Make A appropriate for the algorithm
+	// no page has outdegree 0, using uniform probability 1/n, no personalization
+	
+	int* flag;
+	flag = malloc(d*sizeof(int));
+	for(i=0; i<d ; i++){
+		flag[i] = 0;
+	}
+	for( i=0; i<d ; i++){
+		for(j=0 ; j<d; j++){
+			if(A[i][j]!=0){
+				flag[i]=1;
+			}
+		}
+		if(flag[i] == 1){
+			for(j=0 ; j<d; j++){
+				A[i][j] = 1;     
+			}
+		}
+		printf("A[%d][%d] = %d", i , j, A[i][j]);
+	}
+	
+	//Change to transpose of matrix
+	// Rows become columns
+	
+	int **AT = malloc(d*sizeof(int *));
+	for( i=0; i<d ; i++){
+		AT[i] = malloc(d*sizeof(int));
+	}
+	
+	for( i=0; i<d ; i++){
+		for(j=0 ; j<d; j++){
+			AT[j][i] = A[i][j];
+		}
+	}
+
+}
+
+*/