About

This is a collection of tidbits that Shawn Wallwork discovered while answering (or reading) questions on the Tableau Forums.

3 comments on “About”

  1. Aniket Deshpande says:
    November 23, 2015 at 9:12 pm

    H, Shawn:

    I found you on Tableau forums and wanted some help from you for a problem that I have been trying to solve in Tableau. I would greatly appreciate it if you could help me here. Thanks in advance!

    I have the following dataset:
    Quarter date loss id reserve
    Q1 Jan-15 8 $5,319
    Q1 Jan-15 6 $3,936
    Q1 Jan-15 3 $1,664
    Q1 Jan-15 2 $9,959
    Q1 Feb-15 10 $6,961
    Q1 Feb-15 7 $8,114
    Q1 Feb-15 6 $854
    Q1 Feb-15 4 $4,481
    Q1 Mar-15 9 $8,452
    Q1 Mar-15 7 $4,019
    Q1 Mar-15 6 $5,372
    Q2 Apr-15 2 $2,005
    Q2 Apr-15 2 $539
    Q2 Apr-15 8 $7,057
    Q2 Apr-15 8 $1,741
    Q2 May-15 8 $1,452
    Q2 May-15 8 $5,318
    Q2 May-15 9 $1,576
    Q2 May-15 10 $9,787
    Q2 Jun-15 2 $6,201
    Q2 Jun-15 7 $4,445
    Q2 Jun-15 10 $8,697
    Q2 Jun-15 10 $4,296

    Now, if I filter for only Q1, I want the “lossid” and “reserve” amount corresponding to the max value of date. For example if I filter for Q1 then then following records remain and I have mentioned which should be retained and which should be ignored:

    Quarter date lossid reserve
    Q1 Feb-15 10 $6,961 – retain
    Q1 Mar-15 9 $8,452 – retain
    Q1 Jan-15 8 $5,319 – retain
    Q1 Mar-15 7 $4,019 – retain
    Q1 Feb-15 7 $8,114 – ignore
    Q1 Mar-15 6 $5,372 – retain
    Q1 Feb-15 6 $854 – ignore
    Q1 Jan-15 6 $3,936 – ignore
    Q1 Feb-15 4 $4,481 – retain
    Q1 Jan-15 3 $1,664 – retain
    Q1 Jan-15 2 $9,959 – retain

    that is, the final view should be like this:

    Quarter date lossid reserve
    Q1 Feb-15 10 $6,961
    Q1 Mar-15 9 $8,452
    Q1 Jan-15 8 $5,319
    Q1 Mar-15 7 $4,019
    Q1 Mar-15 6 $5,372
    Q1 Feb-15 4 $4,481
    Q1 Jan-15 3 $1,664
    Q1 Jan-15 2 $9,959

    I have more than 10 quarters of data and the filter can be applied any quarter(s) or year or month and the view should dynamically change as per the rules I have mentioned above.
    Further more I would like to calculate the aggregate reserve amount for that period (filter). Continuing with the above example:

    Period – Total_reserve
    Q1 – $48,886

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    • Shawn Wallwork says:
      November 23, 2015 at 9:19 pm

      Aniket this really is best to post something like this on the forums for a couple of reasons: 1 – You may get more than one answer, and you can chose the one that works best for you, 2 – You can attach a sample workbook so we can more easily understand and answer your question, 3 – Other folks will learn from reading the discussion.

      So please go over to the forums, post your question with a sample packaged workbook, and then if you want come back here and post a link to your question. If I get a link, I’ll post a reply.

      Cheers,

      –Shawn

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