Limiting Bar chart with Variable Input

[Jothi]

The user wants to select top 10/20/50/ All items for the dimension in a bar chart. 

Selecting Top 10/20/50 I have implemented with a Variable input and associating it with the Bar chart Limits. But how to show All? How to dynamically remove the Limit set on the dimension?

[vinieme12]

you need to filter top N based on the rank of the expression

example)

You need to use a calculated dimension in your chart

=if(aggr(rank(sum(Sales),4,2), YourDimension ) <= $(vYourVariable)  , YourDimension  , null() )

Then Uncheck show null values on

replace sum(Sales) with your chart expression