Visualising Multiple Time Series Datasets on 1 Graph

[cb12345]

Hi,

I'm getting started with Power BI, and am trying to use it to overlay two sets of time-series data on a line graph. The data is in seperate tables, with a time/date reading (01/01/2018 00:00 for example) and a temperature reading for each.

Adding the values from the first set of data is easy, it gives me a line graph as I'm expecting with the average temperatures for each day. However, when I attempt to add the second series of data to the graph, Power BI just plots this as the average of all of the values, not the daily averages. See screenshot below.

I would appreciate any pointers or help with this. Thanks in advance!

[Greg_Deckler · Accepted solution]

I would say that the correct way to do this would be to have a third table of all of your time values. You can create this by creating a calculated table like this:

TimeTable = DISTINCT(UNION(DISTINCT('Table1'[Time]),DISTINCT('Table2'[Time])))

Relate this to your other tables in the obvious way. Use this table as your x-axis.

[cb12345]

Thanks Greg, that worked a treat!