I have an underlying DataTable with discrete x-axis categories and multiple series. I'm using DataViews on top of that to generate column charts, so that users can select which series to display (including calculated series that may aggregate multiple source series in various ways). I want to provide the users with multiple sort options, including some based on calculated values, such as the maximum or minimum over all user-selected series, or the difference between the maximum and minimum of user-selected series. I can create a calculated column in my view that generates the values the user wants to sort on (though I wouldn't want to display such a column, so there doesn't seem to be an appropriate role for it), but I can't figure out how to sort on it -- getSortedRows seems to take only column indices from the base table, not calculated columns. Is there a way to do what I want? If not, can I put in a feature request for calculated sort columns?
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