Pivot column issue

Am doing trail for Webix Pivot and finding one issue during processing of data.Below mentioned is the requirement:

Having one column as Rank which has Numeric data example as 1, 2 and so on. However while displaying this column data in pivot i don’t want to display it as is and instead wanted to drive some logic within the same For Example:

If for any Row the rank is 2 will display it as range 1-3, and if Rank is 4 will display as 4-6 and if 11 will display as 8+ and also should be able to use functionality of Min, max and count along with this logic.

Please advise if the same can be accommodated using Webix Pivot control.

It seems that you have posted the issue twice: http://forum.webix.com/discussion/7989/pivot-column-data-issue#latest

but maria i am unable to replace number to char when rank column placed pivot values,when i am trying to replace from number to char it is showing NAN on column.
one more thing can we replace number to color for example if rank is 1 column should be red color