Add bigger datasets and tidy folder up

datasets/Stanford Large Network Dataset Collection/README.md

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+The datasets on this folder where downloaded from the website of the Stanford Network Analysis Project (SNAP), found [here](https://snap.stanford.edu/data/).
+
+More details about the datasets can be found in the table bellow.
+
+| Dataset directory | Description | Nodes | Edges | URL link |
+| ----------- | ----------- | ----------- | ----------- | ----------- |
+| web-Google | "web-Google" | 875,713 | 5,105,039 | [link](https://snap.stanford.edu/data/web-Google.html) |
+| wiki-Talk | "wiki-Talk" | 2,394,385 | 5,021,410 | [link](https://snap.stanford.edu/data/wiki-Talk.html) |
+
+### Adjustments made to the datasets:
+The datasets had four (4) lines of meta-data at the beginning of the files and the data were saved in a form that had one edge per line following the pattern "`linkFrom\tlinkTo\n`", like so:
+```
+linkFrom    linkTo
+linkFrom    linkTo
+...
+```
+A program in C was written to discard the meta-data lines and transform the pattern in a new one that has all the out-links of a page in a single row, like so:
+```
+page_1: linkTo_1 linkTo_2 linkTo_3 ...
+page_2: linkTo_1 ...
+```
+
+The program is provided in this repository, under the pathname: `/datasets/Stanford Large Network Dataset Collection/graphToAdjacencyList.c`.

datasets/Stanford Large Network Dataset Collection/graphToAdjacencyList.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct pair {
+	int from;
+	int to;
+} Pair;
+
+int main(int argc, char const *argv[]) {
+	if (argc != 2) {
+		printf("Usage: ./graphToAdjacencyList <graphFile>\n");
+		exit(EXIT_FAILURE);
+	}
+
+	FILE *graphFile = fopen(argv[1], "r");
+	if (!graphFile) {
+		printf("Error opening file \n");
+		exit(EXIT_FAILURE);
+	}
+
+	char buffer[512];
+	// Skips the first two lines
+	fgets(buffer, 512, graphFile);
+	fgets(buffer, 512, graphFile);
+
+	// Third line has the numbers of nodes and edges, we need to parse them.
+	int numberOfNodes = 0, numberOfEdges;
+	fgets(buffer, 512, graphFile);
+
+	char *token = strtok(buffer, " ");
+	int getNodes = 0, getEdges = 0;
+
+	while (token != NULL) {
+		if (strcmp(token, "Nodes:") == 0) {
+			getNodes = 1;
+		} else if (getNodes == 1) {
+			numberOfNodes = atoi(token);
+			getNodes = 0;
+		} else if (strcmp(token, "Edges:") == 0) {
+			getEdges = 1;
+		} else if (getEdges == 1) {
+			numberOfEdges = atoi(token);
+			break;
+		}
+		token = strtok (NULL, " ,.-");
+	}
+
+	// Skips the fourth line
+	fgets(buffer, 512, graphFile);
+
+	Pair **edges = (Pair **) malloc(numberOfEdges * sizeof(Pair *));
+	printf("Reading edges from file...\n");
+	for (int i=0; i<numberOfEdges; i++) {
+		edges[i] = (Pair *) malloc(sizeof(Pair));
+
+		int f_from = 0, f_to = 0;
+		if (!fscanf(graphFile, "%d %d", &f_from, &f_to)) {
+			break;
+		}
+
+		edges[i]->from = f_from;
+		edges[i]->to = f_to;
+	}
+
+
+	FILE *adjacentListFile = fopen("adjacentListCreated", "w");
+	int index = 0;
+
+	printf("\nWriting nodes to file...\n");
+	for (int i=0; i<numberOfNodes; ++i) {
+		int hasOutlinks = 0;
+
+		fprintf(adjacentListFile, "%d: ", i);
+
+		while (index < numberOfEdges && edges[index]->from == i) {
+			fprintf(adjacentListFile, "%d ", edges[index]->to);
+			if (!hasOutlinks) hasOutlinks = 1;
+			++index;
+		}
+
+		if (!hasOutlinks) {
+			fprintf(adjacentListFile, "-1 ");
+		}
+
+		fprintf(adjacentListFile, "\n");
+	}
+
+	return 0;
+}

datasets/University of Toronto/README.md

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+The datasets on this folder where downloaded from the website of the computer science course at University of Toronto, found [here](http://www.cs.toronto.edu/~tsap/experiments/download/download.html).
+
+More details about the datasets can be found in the table bellow.
+
+| Dataset directory | Description | URL link |
+| ----------- | ----------- | ----------- |
+| \_architecture | "architecture" | [link](http://www.cs.toronto.edu/~tsap/experiments/download/_architecture.tar.Z) |
+| \_blues | "blues" | [link](http://www.cs.toronto.edu/~tsap/experiments/download/_blues.tar.Z) |
+| \_search_engines | "search_engines" | [link](http://www.cs.toronto.edu/~tsap/experiments/download/_search_engines.tar.Z) |
+| \_weather | "weather" | [link](http://www.cs.toronto.edu/~tsap/experiments/download/_weather.tar.Z) |

datasets/list2matrix.c

@@ -1,80 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-int main(int argc, char **argv){
-
-FILE *fnodes;
-char nodes_file[1000];
-FILE *flist;
-char  list_file[1000];
-FILE *fmatrix;
-char  matrix_file[1000];
-int i,j;
-int **E;
-char *path;
-int N; // number of nodes
-
- /*** 
-	The argument for the program is the directory name 
-      	of the query for which we want to create the adjacency matrix
- ***/
-
- if (argc != 2){ 
-	printf("list2matrix query_directory\n");
-	exit(1);
- }
-
- path = strdup(argv[1]);
-
-
-/*** open the nodes file to obtain the number of nodes ***/
-
- sprintf(nodes_file,"%s/graph/nodes",path);
- fnodes = fopen(nodes_file,"r");
- if (fnodes == NULL){
-     printf("ERROR: Cant open file %s\n",nodes_file);
-     exit(1);
- }
- fscanf(fnodes,"%d",&N);
-
- fclose(fnodes);
-
-
-/**** Read List and Construct the adjacency matrix E ****/
-
- E = (int **)malloc(N*sizeof(int *));
- for (i = 0; i < N; i ++){
-	  E[i] = (int *)malloc(N*sizeof(int));
-	  for (j = 0; j < N; j ++){
-			E[i][j] = 0;
-	  }
- }
-
- sprintf(list_file,"%s/graph/adj_list",path);
- flist = fopen(list_file,"r");
- for (i = 0; i < N; i ++){
-     fscanf(flist,"%*d: %d",&j);
-     while (j != -1){
-			E[i][j] = 1;
-			fscanf(flist,"%d",&j);
-	  }
- }
-
- fclose(flist);
-
-
- /*** print the adjacency matrix ***/
-
- sprintf(matrix_file,"%s/graph/adj_matrix",path);
- fmatrix = fopen(matrix_file,"w");
- for (i = 0; i < N; i ++){
-        for (j = 0; j < N; j ++){
-             fprintf(fmatrix,"%d ", E[i][j]);
-        }
-	fprintf(fmatrix,"\n");
- }
- fclose(fmatrix);
-}
-

datasets/smallset

@@ -1,5 +0,0 @@
-0 0 0 0 0
-1 0 1 0 0
-1 1 0 1 1
-0 0 0 0 1
-0 0 0 1 0