Jan, the solution should be quite simple:
- Create a separate table of URLs (I named it URL_list) and link your source tables (URL_1 and URL_2 in my diagram) to this table. You should get something like this:
- Create new calculated fields (Excel 2013, in 2010 it's called Measure) for calculating the average load time:
Formula for table URL_1 (I called it Avg Time in MS_1, see my diagram):
=AVERAGE(URL_1[Millisecond])
Formula for table URL_2 (Avg Time in MS_2):
=AVERAGE(URL_2[Millisecond])
- Once this is done, simply insert a new PowerPivot table and add PivotChart using Options ribbon. Drag URL from table URL_list onto Rows and then add the newly created calculated fields.
The result should look like this:
I have uploaded the Excel file to my Desktop public folder. Hope this helps!