function cluster($k)
{
$db = new db();
$user_dao = new User_dao();
$user = $user_dao->getAll();
//get data user
//create graph
$graph = new Graph(700, 600);
//set graph
$graph->SetScale("linlin");
$graph->img->SetMargin(70, 50, 50, 50);
//$graph->SetShadow();
$graph->title->Set("Friends Twitter Clustering");
$graph->title->SetFont(FF_ARIAL, FS_NORMAL, 14);
$graph->title->SetFont(FF_FONT1, FS_BOLD);
$graph->title->SetMargin(10);
$userx = $user->name;
$graph->subtitle->Set("User: "******" (" . $k . " Kluster)");
$graph->subtitle->SetFont(FF_FONT1, FS_BOLD);
//$graph->yaxis->scale->SetAutoMax(1); //untuk seting max nilai y
//$graph->xaxis->scale->SetAutoMax(1); //untuk seting max nilai x
//
$following_dao = new Following_dao();
/*
$data = $following_dao->get();
$x = array();
$y = array();
for($i=0; $i<count($data); $i++){
$x[]=$data[$i][0];
$y[]=$data[$i][1];
}
//format scatterplots data
$scatterplots = new ScatterPlot($y, $x); // (Data)
$scatterplots->mark->SetType(MARK_FILLEDCIRCLE);
$scatterplots->mark->SetFillColor("blue");
$scatterplots->mark->SetWidth(4);
*/
$warna = array("blue", "orange", "green", "purple", "maroon", "pink", "cyan", "violet", "lime", "fuchsia", "maroon", "olive", "navy", "purple", "chocolate", "coral", "lightblue", "orchid", "skyblue", "yellow", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "");
//warna untuk cluster
//data cluster
for ($i = 0; $i < $k; $i++) {
$x = array();
$y = array();
$data = $following_dao->getByCluster($i + 1);
//var_dump($data);
for ($j = 0; $j < count($data); $j++) {
$x[] = $data[$j][0];
$y[] = $data[$j][1];
}
//var_dump($x);
$scatterplots[$i] = new ScatterPlot($y, $x);
$scatterplots[$i]->mark->SetType(MARK_FILLEDCIRCLE);
if ($warna[$i] == "") {
$warna[$i] = "gold";
}
$scatterplots[$i]->mark->SetFillColor($warna[$i]);
$scatterplots[$i]->mark->SetWidth(3);
$graph->Add($scatterplots[$i]);
}
// data centroid
$centroid_dao = new Centroid_dao();
$data2 = $centroid_dao->get();
$x2 = array();
$y2 = array();
for ($i = 0; $i < count($data2); $i++) {
$x2[] = $data2[$i][0];
$y2[] = $data2[$i][1];
}
$centroids = new ScatterPlot($y2, $x2);
// (Centroids)
$centroids->mark->SetType(MARK_CROSS);
$centroids->mark->SetFillColor("red");
$centroids->mark->SetColor("red");
$centroids->mark->SetWeight(10);
$centroids->mark->SetWidth(50);
$centroids->value->SetColor("black");
// Add plots to graph.
$graph->Add($centroids);
//$graph->Add($scatterplots);
$graph->xaxis->title->Set('Followers Similarity');
$graph->yaxis->title->Set('Followings Similarity');
$graph->yaxis->title->SetMargin(10);
// Display graph
$graph->Stroke();
}
