Hey Guys, can any one suggest on my request?
You can find the solution here: https://www.interworks.com/nl/blog/rcurtis/2016/06/16/tableau-deep-dive-parameters-table-calculations.
Their so called 'Deep dives' is really helpfull, you might want to check them out!
1. Made the table calculation
2. Drag the table calculation into your data pane, then it becomes an calculated field and edit, it will look like this.
3. Change the -2 into your parameter
4. Show the parameter and you're done!