Following on from my previous post I'm going to do a quick tutorial on how to make a Top N Parameter which can be used to filter your charts and graphs by the top specified number of results.

Firstly we need to create the new parameter:

• Select the small arrow next to the search bar and select 'create parameter'
• Change the name so that its easy to keep track of your data pane.
• Change the data type to integer and change the current value.
• change the data to range and select the range you would like to cover e.g 5-100 and also the increments you'd like to increase or decrease the parameter.  

Once the parameter is done you will need to add this parameter as a filter for our data.

• On the row shelf right click on the dimension value and select filter
• on the pop up select 'use all values'.
• Select the 'top' tab and in the 'by field' select 'top N parameter'

Make sure to select show parameter on the data pane to make this show up on the right hand side. This is a great tool to only show data that you want to look at and makes it easy to change if you decide to broaden or shrink your ranges.