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Do you use lag(x)?

hogi
Level XII

hogi_2-1736536615203.png

... seems that this is no longer possible: 

hogi_0-1736574848597.png

tested with JMP18.1.1

 

JMP17:

hogi_3-1736536719759.png

 

2 ACCEPTED SOLUTIONS

Accepted Solutions
hogi
Level XII


Re: Do you use lag(x)?

The good thing:
It's not a general issue of "Lag"

... it seems to be caused by:

hogi_1-1736578008881.png

 

When I generate the Formula this way, the entries are empty.
When I create a new column and add the formula afterwards, the values are calculated.

 

added: video with different ways to generate the formula column

  1. new formula column: add lag via click      -> fail
  2. new formula column: add lag manually    ->  fail
  3. new formula column: delete code and write again    -> fail
  4. new column -> add formula manually -> works
  5. new column -> add formula column via click and write (like #2) -> works

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      View solution in original post

      jthi
      Super User


      Re: Do you use lag(x)?

      Seems like JMP will incorrectly evaluate the "missing" argument to Empty()

      // Transform column
      Data Table("Big Class") << Apply Formula(
      	Columns(:weight),
      	Formula(Lag(:weight, Empty())),
      	Output(New Formula)
      );

      If you use Lag under Row this doesn't happen as it uses other method to create the column

      // New formula column: Lag[weight]
      Data Table("Big Class") << New Formula Column(
      	Operation(Category("Row"), "Lag"),
      	Columns(:weight)
      );

       

      Edit: And it does happen with other functions too (at least with Dif but there could be other)

      // Transform column
      Data Table("Big Class") << Apply Formula(
      	Columns(:weight),
      	Formula(Dif(:weight, Empty())),
      	Output(New Formula)
      );
      
      -Jarmo

      View solution in original post

      6 REPLIES 6
      Jeff_Perkinson
      Community Manager Community Manager


      Re: Do you use lag(x)?

      Seems to work fine in all the versions I tried, including 18.1.1.

      2025-01-10_17-05-01.034.png

      -Jeff
      hogi
      Level XII


      Re: Do you use lag(x)?

      Ok, good.

      And kind of strange ...

      So, it's neither 100% gone - nor 100% working.
      what makes the difference ?

      PC vs. Mac?
      ... I will check my preferences - and compare with more colleagues.

      hogi
      Level XII


      Re: Do you use lag(x)?

      The good thing:
      It's not a general issue of "Lag"

      ... it seems to be caused by:

      hogi_1-1736578008881.png

       

      When I generate the Formula this way, the entries are empty.
      When I create a new column and add the formula afterwards, the values are calculated.

       

      added: video with different ways to generate the formula column

      1. new formula column: add lag via click      -> fail
      2. new formula column: add lag manually    ->  fail
      3. new formula column: delete code and write again    -> fail
      4. new column -> add formula manually -> works
      5. new column -> add formula column via click and write (like #2) -> works

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      1x
        • Chapters
        • descriptions off, selected
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          (view in My Videos)

           

           

          hogi
          Level XII


          Re: Do you use lag(x)?

          I submitted a ticket to JMP support: TS-00182750
          let's see ...

          jthi
          Super User


          Re: Do you use lag(x)?

          Seems like JMP will incorrectly evaluate the "missing" argument to Empty()

          // Transform column
          Data Table("Big Class") << Apply Formula(
          	Columns(:weight),
          	Formula(Lag(:weight, Empty())),
          	Output(New Formula)
          );

          If you use Lag under Row this doesn't happen as it uses other method to create the column

          // New formula column: Lag[weight]
          Data Table("Big Class") << New Formula Column(
          	Operation(Category("Row"), "Lag"),
          	Columns(:weight)
          );

           

          Edit: And it does happen with other functions too (at least with Dif but there could be other)

          // Transform column
          Data Table("Big Class") << Apply Formula(
          	Columns(:weight),
          	Formula(Dif(:weight, Empty())),
          	Output(New Formula)
          );
          
          -Jarmo
          hogi
          Level XII


          Re: Do you use lag(x)?

          Good point, thanks @jthi for digging deeper.

           

          I never paid attention and noticed the 2 ways formula editor displays optional arguments:

          1. explicit:
            hogi_1-1736585128111.png

          2. not [just in the description]:
            hogi_0-1736585047899.png