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Dataplot Vol 2 Vol 1

OMIT

Name:
    OMIT (LET)
Type:
    Let Subcommand
Purpose:
    Given a group-id variable, create a tag variable based on a list of groups to omit.
Description:
    For some analyses, it may be necessary to omit some laboratories from the analysis. Although you can create an appropriate tag variable manually, the OMIT command can simplify that process.

    For example, if you have labs 1 to 10 and you want to omit labs 3 and 8 from the analysis, you can do something like the following

      LET XOMIT = DATA 3 8
      LET TAG = OMIT X XOMIT

    That is, this command will return a tag variable (TAG) based on the values of X. Values of X that match any value in XOMIT will be set to 0 and values of X that do not match any values in XOMIT will be set to 1.

Syntax:
    LET <tag> = OMIT <x> <xomit>             <SUBSET/EXCEPT/FOR qualification>
    where <x> is the group-id variable;
                <xomit> is a list of values to match against <x>;
                <tag> is a variable of the same length as <x> that will contain 0 where a match is found and 1 otherwise;
    and where the <SUBSET/EXCEPT/FOR qualification> is optional.
Examples:
    LET TAG = OMIT X XOMIT
Note:
    The KEEP command is similar. However, with the KEEP command you specify a list of lab id's to keep rather than to omit.
Default:
    None
Synonyms:
    None
Related Commands:
    KEEP = Create a tag variable based on a list of labs to keep.
    CODE = Generate a coded variable.
    COCODE = Generate a coded variable based on another variable.
    COCOPY = Generate a coded variable based on another variable.
Applications:
    Data Transformations
Implementation Date:
    2011/4
Program: 
     
skip 25
read gear.dat y x
set write decimals 4
.
let xomit = data 1 3 5 7 8 9
let tag = omit x xomit
print x tag y
    The following output is generated 
    ---------------------------------------------
              X            TAG              Y
---------------------------------------------
         1.0000         0.0000         1.0060
         1.0000         0.0000         0.9960
         1.0000         0.0000         0.9980
         1.0000         0.0000         1.0000
         1.0000         0.0000         0.9920
         1.0000         0.0000         0.9930
         1.0000         0.0000         1.0020
         1.0000         0.0000         0.9990
         1.0000         0.0000         0.9940
         1.0000         0.0000         1.0000
         2.0000         1.0000         0.9980
         2.0000         1.0000         1.0060
         2.0000         1.0000         1.0000
         2.0000         1.0000         1.0020
         2.0000         1.0000         0.9970
         2.0000         1.0000         0.9980
         2.0000         1.0000         0.9960
         2.0000         1.0000         1.0000
         2.0000         1.0000         1.0060
         2.0000         1.0000         0.9880
         3.0000         0.0000         0.9910
         3.0000         0.0000         0.9870
         3.0000         0.0000         0.9970
         3.0000         0.0000         0.9990
         3.0000         0.0000         0.9950
         3.0000         0.0000         0.9940
         3.0000         0.0000         1.0000
         3.0000         0.0000         0.9990
         3.0000         0.0000         0.9960
         3.0000         0.0000         0.9960
         4.0000         1.0000         1.0049
         4.0000         1.0000         1.0020
         4.0000         1.0000         0.9940
         4.0000         1.0000         1.0000
         4.0000         1.0000         0.9950
         4.0000         1.0000         0.9940
         4.0000         1.0000         0.9980
         4.0000         1.0000         0.9960
         4.0000         1.0000         1.0020
         4.0000         1.0000         0.9960
         5.0000         0.0000         0.9980
         5.0000         0.0000         0.9980
         5.0000         0.0000         0.9820
         5.0000         0.0000         0.9900
         5.0000         0.0000         1.0020
         5.0000         0.0000         0.9840
         5.0000         0.0000         0.9960
         5.0000         0.0000         0.9930
         5.0000         0.0000         0.9800
         5.0000         0.0000         0.9960
         6.0000         1.0000         1.0089
         6.0000         1.0000         1.0129
         6.0000         1.0000         1.0089
         6.0000         1.0000         0.9970
         6.0000         1.0000         0.9880
         6.0000         1.0000         1.0020
         6.0000         1.0000         0.9950
         6.0000         1.0000         0.9980
         6.0000         1.0000         0.9810
         6.0000         1.0000         0.9960
         7.0000         0.0000         0.9900
         7.0000         0.0000         1.0040
         7.0000         0.0000         0.9960
         7.0000         0.0000         1.0009
         7.0000         0.0000         0.9980
         7.0000         0.0000         1.0000
         7.0000         0.0000         1.0180
         7.0000         0.0000         1.0100
         7.0000         0.0000         0.9960
         7.0000         0.0000         1.0020
         8.0000         0.0000         0.9980
         8.0000         0.0000         1.0000
         8.0000         0.0000         1.0060
         8.0000         0.0000         1.0000
         8.0000         0.0000         1.0020
         8.0000         0.0000         0.9960
         8.0000         0.0000         0.9980
         8.0000         0.0000         0.9960
         8.0000         0.0000         1.0020
         8.0000         0.0000         1.0060
         9.0000         0.0000         1.0020
         9.0000         0.0000         0.9980
         9.0000         0.0000         0.9960
         9.0000         0.0000         0.9950
         9.0000         0.0000         0.9960
         9.0000         0.0000         1.0040
         9.0000         0.0000         1.0040
         9.0000         0.0000         0.9980
         9.0000         0.0000         0.9990
         9.0000         0.0000         0.9910
        10.0000         1.0000         0.9910
        10.0000         1.0000         0.9950
        10.0000         1.0000         0.9840
        10.0000         1.0000         0.9940
        10.0000         1.0000         0.9970
        10.0000         1.0000         0.9970
        10.0000         1.0000         0.9910
        10.0000         1.0000         0.9980
        10.0000         1.0000         1.0040
        10.0000         1.0000         0.9970

Date created: 06/23/2011
Last updated: 06/23/2011
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