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Selecting top N values in Power BI

The Top N filter can be useful in several situations where you want to focus on the most important or relevant values in your data. Here are some scenarios where you might use a Top N filter in Power BI:

  • Ranking: If you want to see the top performers or the worst performers in your data, you can use a Top N filter to rank them based on a specific metric.
  • Focus on outliers: Sometimes, you may want to focus on the most extreme values in your data, such as the top 10 highest or lowest sales amounts, to understand why they are outliers and what factors are driving them.
  • Limiting data: When dealing with large datasets, the Top N filter can help you limit the amount of data displayed in your visuals to make them more manageable and easier to analyze.
  • Presenting information: In reports or presentations, you may want to highlight the most important values to your audience. A Top N filter can help you do this by emphasizing the top values and de-emphasizing the rest.

Overall, the Top N filter can be a powerful tool for exploring and visualizing your data in Power BI, particularly when you want to focus on specific subsets of your data based on their ranking or significance. Below we will go through how to select top N values with an example. The starting point is the following Dount chart, where Sales per Product Category are displayed. 

To select top n values in Power BI, you can use the "Top N" filter feature. Here are the steps to follow:

  1. Click on the visual or field that you want to filter.
  2. Go to the "Filters" pane on the right-hand side of the screen.
  3. Click the field on which you want to base the selection, in our case Product Category.
  4. In the "Filters" pane that appears, select "Top N" as the Filter type.
  5. In the "Top N" tab, enter the number of values you want to display in the "Top" box.
  6. Choose the field you want to filter by from the "By Value" drop-down menu.
  7. Click apply filter, and you are done! 

The visual or field you selected will now display only the top n values based on the field you selected in step 6.

Note that this filter will be applied to the entire visual or field you selected, so if you want to apply the filter to only one column in a table or matrix visual, you will need to select that column first before applying the filter.

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