I have written the code for column chart as follows:

$(document).ready(function() {
      chart1 = new Highcharts.Chart({
         chart: {
            renderTo: 'container1',
            type: 'column'
         },
         title: {
            text: 'Service Calls-Days Over'
         },
         xAxis: {
            categories:<?php echo json_encode($model['dashchart']); ?>
         },
         yAxis: {
 },
         series: [{
            name: 'Service Calls-Days Over',
            color:'#e48801',
            data: <?php echo json_encode($model['dashchart']);?>
         }
         ]
      });

but still i am not able to draw the chart.