Google Visualization Column Chart - How to make labels as currency - php

Question

I'm just trying to figure out to format my labels to be shown as a currency and not just a number:
echo ' <script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn("string", "ZipCode");
data.addColumn("number", "Sales");
data.addRows('.$count.');';
$i = 0;
foreach ($results as $r) {
$p = (($r->report_trans_amount / $total) * 100);
$pd = strval(number_format($p, 1));
echo ' data.setValue(' . $i . ', 0, "' . $r->member_address_zip_code .
' - ' . $pd . '%");';
echo ' data.setValue(' . $i . ', 1, ' . $r->report_trans_amount . ');';
$i++;
}
echo ' var chart = new google.visualization.PieChart(
document.getElementById("chart_div"));
chart.draw(data, {width:900, height:500, is3D:true});
}
</script>
<div id="chart_div"></div>
';
I would like the Sales column to be shown as a USD currency value. How can I do that? I see how to do it using the URL request, but that does not help this situation.
I just can't seem to find any good example on this.

Answer 1

it looks like you might want to look at setFormattedValue
http://code.google.com/apis/chart/interactive/docs/reference.html#DataTable_setFormattedValue
and for the format stuff look at
http://code.google.com/apis/chart/interactive/docs/reference.html#formatters
I haven't tried this out, but from what I can tell this could work for you:
echo '
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn("string", "ZipCode");
data.addColumn("number", "Sales");
data.addRows('.$count.');
var formatter = new google.visualization.NumberFormat({prefix: \'$\'});
formatter.format(data, 1);';
$i = 0;
foreach($results as $r){
$p = (($r->report_trans_amount / $total) * 100);
$pd = strval(number_format($p, 1));
echo 'data.setValue('.$i.', 0, "'.$r->member_address_zip_code.' - '.$pd.'%");';
//echo 'data.setFormattedValue('.$i.', 1, formatter);'; // might not need this with the formatter.format above
echo 'data.setValue('.$i.', 1, '.$r->report_trans_amount.');';
$i++;
}
echo ' var chart = new google.visualization.PieChart(document.getElementById("chart_div"));
chart.draw(data, {width:900, height:500, is3D:true});
}
</script>
<div id="chart_div"></div>
';
references:
http://code.google.com/p/google-visualization-api-issues/issues/detail?id=282