How to convert text into variable

[paredlx2]

Hello everyone

I'm new in QlikView. and I want to create a Dynamic expression.

i have the next expression

Sum( $(v_sales_YTD))

but i want to change the YTD dynamically from a list box.

i try this but doesn't work

"Sum( $(v_sales_"& variable &"))"

please help me

regards

[Anil_Babu_Samineni]

What YTD Dynamic you are expecting?

[MK9885]

What is stored in $(v_sales_YTD)?

[paredlx2]

thanks for your response.  i want to change de YTD  for MAT or MTH

[lcontezini]

take a look at this:

Variables with Parameters