It looks like the Table visualization is sorting columns by their
formatted values rather than their actual values.

For instance, look at the first table on this page:
http://code.google.com/apis/visualization/documentation/gallery/table.html

Click on the "Salary" column once to sort the table in ascending order
by salary. The salary column will now look like this:

$7,000
$800
$10,000
$12,500

Note that $7,000 comes before $800. It appears that the sort was done
by lexicographical order on the formatted value rather than by
numerical order on the actual value.

I would have expected it to instead have sorted like this:

$800
$7,000
$10,000
$12,500

The actual values given in setCell() calls were 800, 7000, 10000, and
12500. Shouldn't the sort use these instead?


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