Alright so I'm not sure if there's an easier way to do this but this is the 
issue I'm dealing with right now. I have a datatable in which I want to 
tally up the unique values in a column. For example in this case I would 
want to tally up the number of males and females in the column.  
http://code.google.com/apis/ajax/playground/?type=visualization#full_dashboard

I then want to display a separate pie chart with that data. I think I found 
a sum function that could add up numbers in a table but I couldn't find one 
that would tally up the unique values of strings. As such I wrote my own 
function to loop through and tally up the totals. However I want the pie 
chart to be binded to the datatable such that when the picker filters out 
the rows (such as moving the age up), the pie chart would change 
accordingly as well. Right now the pie chart I generate is based on only 
the values from the source of the datatable so the chart never changes when 
I filter out rows with the picker. My idea was instead to call the function 
every time a picker is selected to recalculate the tallys using the new 
filtered data table so that the pie chart would be redrawn every time. My 
question is if there's a way to get retrieve the data from the new table 
and pass it to my function. Or what would be even easier is to somehow bind 
two charts that are coming from different sources of data but right now 
this is the only way I could think of.

Thanks!

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