Dear sirs,
in your example http://dhtmlx.com/docs/products/dhtmlxGrid/samples/16_rows_columns_manipulations/17_pro_math.html you explain how to get a total of a column --> (=[[1,4]]+[[2,4]]+[[3,4]]+[[4,4]]+[[5,4]]+[[6,4]]+[[7,4]]+[[8,4]]).
Is there a way to write this a little bit more dynamically? My grid has got 20.000 - 300.000 rows and i don’t want to write “[[1,4]]+” for each row 
Something like EXCEL’s “SUM” function ?!
Thank you in advance.
greetings
Oliver