how to update var base on filter

[grant_S]

let a = 5

test:

load * inline [

id

1

2

3

];

i want to update variable "a" to be updated base on filter, for examle when filter id "2", variable "a" change to 2

how to do it?

thanks advanced.

[avinashelite · Accepted solution]

Create a variable in the front end like this 

a = GetFieldSelections(id)