I am using the groupBy function and trying to use the second parameter (which is undocumented except in the pdf math operations in group by mode) to show subtotals. For example
grid.groupBy(2,["#stat_max","#title","","#stat_total","","#cspan","#cspan","#cspan"]);
Can you tell me if this is a working feature?
Such functionality is available since dhtmlxGrid ver. 2.1. To use math operations with groupBy method you should include file dhtmlxgrid_group.js which is part of PRO version