how to use a variable in edit expression for column label

[Tejeswari_123]

Hi ,

I am trying to give a column label using variable in edit expression , want to give variable value as column label.

Can any one help me here ?

[Navars]

firstly create a variable and use that variable in the label like below.

[Tejeswari_123]

I have columns like  y_2021 ,y_2022,,y_2023,

now I want to get the column values in edit expression for chart

using a variable

like sum(y_$(vYear))