Find the Average of Closest 2 Numbers out of 3 [formula challenge]

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Today I am asking you a tricky formula question. This is asked by Ionel on the Introduction to VLOOKUP, OFFSET & MATCH Formulas post.

The question is,

I have data in three columns: A,B,C and I want to get the average of the closest two values out of three in each row. Could you help me with a formula for this?

Now, how would you go about it?

Calculating Average of closest 2 numbers using ExcelWhat does closest of two mean?

We can assume that close-ness is nothing but distance between 2 numbers on numeric scale. So 3 is closer to 2 and 4 compared to 1 or 5.

Your challenge:

Assuming your data is in A2:C10, what formula will you write in D2:D10 to solve this?

Go ahead and get some coffee and get thinking.

Want to cop-out?

I have posted one solution in the next comment. You can see how I went about solving it.

More Formula Challenges:

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9 Responses to “Show forecast values in a different color with this simple trick [charting]”

  1. Jake says:

    While this works in a pinch, it clearly "lightens" the colors of the entire chart. Depending on where you use this, it will be blatantly obvious that you don't know what you are doing and present a poor looking graph.

    Why not separate the data into different segments when charting and have as many colors as you have data points? You might have to create a new legend and/or repeat the chart in "invisible ink", but it would be cleaner and more consistent when new or updated data becomes available.

    • Andy F says:

      While I think I agree that doing it "properly" via a second series is preferable, I don't necessarily agree that making the entirety of the "future" (data, gridlines, and even the axis) semi-transparent is "poor looking". I think it could be seen as adding more emphasis to the "future-ness" of the forecast data.

      In short, it's another tool for the toolbox, even if it's never needed.

  2. Kiev says:

    Quick & effective, cool. thanks.

  3. dan l says:

    I always use the dummy series.

  4. Peter Stratton says:

    Nice little trick, thanks very much!

  5. excel says:

    Two sets of data better. Control is much better.
    You can use the same chart next month to see what is actual and what is forecast.

    To use this trick, I think grid lines has to be removed, that will make the graphic much more sharp.

  6. gossip_boi says:

    to be honest, i dont understand why there is needed to do this way... in this case horizontal lines will be pale as well. then why a just can't change the color of the line partly???

  7. Great tutorial. Thanks for the tutorial!

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