Logarithmic axis

<?php
$this->Widget('ext.highcharts.HighchartsWidget', array(
    'options'=>"{             
        title: {
            text: 'Logarithmic axis demo'
        },            
        xAxis: {
            tickInterval: 1
        },            
        yAxis: {
            type: 'logarithmic',
            minorTickInterval: 0.1
        },            
        tooltip: {
            headerFormat: '<b>{series.name}</b><br />',
            pointFormat: 'x = {point.x}, y = {point.y}'
        },            
        series: [{            
            data: [1, 2, 4, 8, 16, 32, 64, 128, 256, 512],
            pointStart: 1
        }]
    }"
));
?>