สอบถามวิธีเรียก jpgraph จาก controller ไปแสดงกราฟที่หน้าวิว

public function test(){

    // Some data
        $p1 = array(20,27,45,75,90);
        
        // Create the Pie Graph.
        $graph = new PieGraph(800,450);
        $graph->SetShadow();
        
        // Set A title for the plot
        $graph->title->Set("Pie Graph");
        $graph->title->SetFont(FF_VERDANA,FS_BOLD,18); 
        $graph->title->SetColor("darkblue");
        $graph->legend->Pos(0.1,0.2);
        $graph->legend->Pos(0.9,0.9,'left','bottom');
        $graph->legend->SetLayout(LEGEND_VERT);
        
        // Create pie plot
        $p1 = new PiePlot3d($p1);
        $p1->SetTheme("earth");
        $p1->SetCenter(0.4);
        $p1->SetAngle(20);
        $p1->value->SetFont(FF_ARIAL,FS_NORMAL,12);
        $p1->SetLegends(array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct"));

        $graph->Add($p1);
        $data['graps'] = $graph->Stroke();

        $this->load->view("viewfile", $data);

   }

<?php
echo $graps;  // มาจาก $data[graps];
?>