I am attempting to use Treemap on a web page for the first time. My data
is retrieved from a server-side, perl script. When I use static, dummy
data, my Treemap displays properly. Dummy data is only 54 rows. However,
when I query my database, and return 1145 rows of data, the Treemap
displays with the "root node", but nothing else - it is just blank space.
My data is formatted the same way in both cases, with my "containers" at
the top of the recordset and my "data points" at the bottom of the list. I
have attached a screen shot of where my chart should be, but isn't. [image:
Blank Treemap.png]
Is there some limit to the number of rows of data? Is there some limit to
the "distance between the 'containers' and the 'data points'"? Has anybody
else even seen a "blank" chart like this? Any ideas on how to get my 1145
rows of data to display in a Treemap?
I get my data via an $.ajax() call (which returns JSON), and pass it to
this function to draw my Treemap.
function drawTreemap (newdata) {
data = new google.visualization.arrayToDataTable(newdata);
tree = new
google.visualization.TreeMap(document.getElementById('chart_div'));
tree.draw(data, {
title: 'Top Credit Hours Earned',
minColor: '#AADDE9',
midColor: '#00eee9',
maxColor: '#0f0',
headerHeight: 15,
fontColor: 'black',
showScale: true,
generateTooltip: showCredits
});
}
My "data" is present, both because "System" is my root node and because I
can log it to the console. When the Treemap displays properly, my
showCredits() function works properly.
Thanks, all.
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