Tooltip in Scatter - highcharts

Question

I having problem adding unix timestamp as extra point in tooltip.
My code is showing no graph. Help!
Here is part of my code:
My data array: $data[] = "[x:$valDE,y:$valDN,z:$datetime]";
And my javascript:
var <?php echo $chart ?> = new Highcharts.Chart({
chart: {
type: 'scatter',
renderTo: '<?php echo $container ?>',
zoomType: '',
marginLeft: 50,
borderWidth: 1
},
title: {
text: '<?php echo "$gps $location"; ?>',
style: {
fontSize: '<?php echo $sizeTitle ?>'
}
},
subtitle: {
text: 'Data is average pr. day - viewing <?php if($range == "All"){echo "ALL DATA";}else if($range == "1 YEAR"){echo "LAST YEAR";}else{ echo "last ".$range;} ?>',
style: {
fontSize: '<?php echo $sizeSubTitle ?>'
}
},
xAxis: {
title: {
enabled: true,
text: 'EW',
align: 'high'
},
min:-<?php echo $maxAxis ?>,
max:<?php echo $maxAxis ?>,
offset: <?php echo $offSetX ?>,
tickInterval: <?php echo $tickInterval ?>
},
yAxis: {
title: {
text: 'NS',
align: 'high'
},
min:-<?php echo $maxAxis ?>,
max:<?php echo $maxAxis ?>,
offset:<?php echo $offSetY ?>,
lineWidth:1,
tickInterval: <?php echo $tickInterval ?>
},
legend: {
layout: 'vertical',
align: 'left',
verticalAlign: 'top',
x: <?php echo $legendX ?>,
y: <?php echo $legendY ?>,
floating: true,
backgroundColor: '#FFFFFF',
borderWidth: 1,
itemStyle: {
fontSize: '<?php echo $legendSize ?>'
}
},
plotOptions: {
scatter: {
marker: {
radius: <?php echo $lineWidth ?>,
states: {
hover: {
enabled: false,
lineColor: 'rgb(100,100,100)'
}
},
symbol: "circle"
},
states: {
hover: {
marker: {
enabled: false
}
}
},
tooltip: {
headerFormat: '<b>{series.name}</b><br>',
pointFormat: 'EW: {this.x} mm<br>NS: {this.y} mm<br>Date: {this.point.z}'
}
}
},
series: [{
color: '#990000',
name: '<?php echo $legFive ?>',
data:[<?php echo join(${$da}, ',') ?>]
},{
color: '#ff0000',
name: '<?php echo $legFour ?>',
data:[<?php echo join(${$da4}, ',') ?>]
},{
color: '#ffcc33',
name: '<?php echo $legThree ?>',
data:[<?php echo join(${$da3}, ',') ?>]
},{
color: '#66ff66',
name: '<?php echo $legTwo ?>',
data:[<?php echo join(${$da2}, ',') ?>]
},{
color: '#3300ff',
name: 'Last',
data:[<?php echo join(${$da1}, ',') ?>]
}]
});
<?php }//for ?>
});

Answer 1

See this example for how to go about it:
http://jsfiddle.net/jlbriggs/fbMQf/
You need to supply the data as an object with key->value pairs, and call accordingly in your formatter.
see fiddle for code

Answer 2

UNIX timestamps should be multiply by 1000, and be sorted by x ascending. Could you attach your example series data: "echo join(${$da1}, ',')" ?