<div id="visualization" style="width: 800px; height: 300px;"></div>
<a href="http://code.google.com/apis/visualization/documentation/gallery/barchart.html">Google bar chart vizualization documentation</a>

<p><b>Other keys:</b> 
<?php 
for ($i = 0; $i < count($keys); $i++) {
    echo '<a href="?' . $i . '">' . $keys[$i] . "</a> ";
}
?>
   
</p>        
    

<?php 
$sourcescraper = 'vca-car-fuel-data';
$keys = scraperwiki::getKeys($sourcescraper);
$keyindex = getenv("URLQUERY");
if ($keyindex == False) {
    $keyindex = 4;
}
$key = $keys[$keyindex];
$counts = array();
$s = scraperwiki::getData($sourcescraper, $limit = 250);
foreach ($s as $c => $row) {
    foreach ($row as $k => $value) {
        if ($k == $key) {
            if (!array_key_exists($value, $counts)) {
                $counts[$value] = 0;
            }
            $counts[$value] += 1;
        }