SAS Institute Alert Note SN-004968

From: SAS Technical Support (LISTSERV@VM.SAS.COM)
Date: Tue May 22 2001 - 07:06:19 EDT

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    SN-004968 ***Alert Note***

    Replacement node results may depend upon the order of data values when
    replacing multiple values by existing data values

    Product: Enterprise Miner
    Component: Replacement node
    Priority: ALERT

      In the Replacement node of Enterprise Miner, the results may incorrectly
      depend on the order of the data and replacement values. This will occur
      only when you are replacing multiple values and when the new formatted
      value matches another value that gets replaced.

      As an example suppose you have a data set with values A, B, C, and D,
      and that you would like to have those values replaced with either B or
      X as follows:

      A -> B
      B -> X
      C -> B
      D -> X

      Note that one of the replacement values, B, is also a data value.
      Because of this problem, all "if" checks are applied to all observations
      in sequence. The first condition changes the A values to B, but the
      second condition goes on to change the B to an X. The incorrect data
      set then looks like this:

      X (this X should be a B)
      X
      B
      X

      There are no errors or warnings produced and there is no circumvention
      for this problem.

      To determine whether or not you have encountered this problem in your
      analysis, examine your data and verify that the mappings have been done
      correctly.

    Keywords:
      incorrout incorrstat replacement node replace incorrect
      replacement node results may depend upon the order of data values when
      replacing multiple values by existing data values
      004968 4968

    SAS Note Revised On: Mon, 21 May 2001

    System Version Reported Version Fixed

    AIX/6000 4.0
    AIX/6000 4.1
    Compaq Tru64 UNIX 4.0
    Compaq Tru64 UNIX 4.1
    HP-UX Operating Systems 4.0
    HP-UX Operating Systems 4.1
    Solaris 4.0
    Solaris 4.1
    Windows NT 4.0
    Windows NT 4.1
    Windows 95 4.0
    Windows 95 4.1

    No Fixes Available

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