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Dataplot Vol 2 Vol 1

UNIQUE

Name:
    UNIQUE (LET)
Type:
    Let Subcommand
Purpose:
    Compute the number of distinct values in a variable.
Description:
    This command is the equivalent of

      LET YD = DISTINCT Y
      LET ND = SIZE YD

    However, in some cases you may just need the number of distinct values, not the values themselves. This is the case where the UNIQUE command is useful.

Syntax:
    LET <par> = UNIQUE <y>             <SUBSET/EXCEPT/FOR qualification>
    where <y> is the response variable;
                <par> is a parameter where the number of distinct values is saved;
    and where the <SUBSET/EXCEPT/FOR qualification> is optional.
Examples:
    LET NBATCH = UNIQUE BATCH
Note:
    Dataplot statistics can be used in a number of commands. For details, enter

    The UNIQUE command is not typically used in the context of these other commands.

Default:
    None
Synonyms:
    None
Related Commands:
    SIZE = Compute the number of elements in a variable.
    DISTINCT = Extract the distinct values from a variable.
Applications:
    Data Management
Implementation Date:
    2011/7
Program: 
     
SKIP 25
READ GEAR.DAT Y X
LET ND = UNIQUE X
XLIMITS 1 ND
MAJOR XTIC MARK NUMBER ND
MINOR XTIC MARK NUMBER 0
TIC MARK OFFSET UNITS DATA
XTIC MARK OFFSET 0.5 0.5
Y1LABEL Mean
X1LABEL Batch
LABEL CASE ASIS
MEAN PLOT Y X
    plot generated by sample program

Date created: 07/22/2011
Last updated: 07/22/2011
Please email comments on this WWW page to alan.heckert@nist.gov.