How can I put a variable as a vector position?

[Yang]

function Up (source )
    setElementPosition ( source, 0, 3400, variable )
end

I want to put a variable, but a can't

Edited October 12, 2018 by Yang

[LyricalMM]

local x,y,z = 1, 1, 1
setElementPosition(source, 0, 3400, z)

 

 

[Yang]

Thanks