Computing numerical derivative from discrete data points in Excel by DERIVXY() function

[@abdiqanifarah9375]

Thanks for that, but DERIVXY() function is not available in my excel program. how can I find it in excel or download it

[@excelworksllc1994]

DERIVXY() is included with ExceLab Add-in. Please visit excel-works.com to download a copy.

[@ferny4603]

@@excelworksllc1994 thanks!