Filtering Chart with Shading

[scgilbert1]

Hello,

I have always been interested in the dynamic filtering other programming languages have. I know excel has timeline filters but I am looking more for something like the following charts. Overall, the functionality works as following. The user can use one of the two scrollbars below the charts to filter the view of the top chart. They can see what is being filtered in the bottom chart.

Here is how I created it:

1. Top chart is based on a filtered range of the base data using the new filter function.
2. Bottom chart is the full data with the addition of a secondary axis using True/False. False = Visible and True = Not Visible or Filtered. I reduced the gap between bars so it appears as shading.
3. The two scrollbars return a period with the top scrollbar managing the lower range and the bottom scrollbar managing the upper range.

Overall, it works but I cannot solve the following:

• The top chart shows blanks for the full data set. I think this is because the filtered output is smaller than the range the chart is looking at. I don't know how to get Excel to ignore the empty cells so the chart condenses to only what is shown.
• I cannot seem to remove the secondary axis on the bottom chart. When I do, it moves the secondary axis data back to the primary axis so I lose my shading.
• When I use the scrollbars, the filtered data updates in real time but the charts don't update until I release the scrollbar. It would be nice for the chart to update in real time too.

Thank you!