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Dataplot Vol 2 Vol 1

INDEX MAXIMUM

Name:
    INDEX MAXIMUM
Type:
    Let Subcommand
Purpose:
    Compute the index of the maximum value in a variable.
Syntax:
    LET <par> = INDEX MAXIMUM <resp>
                            <SUBSET/EXCEPT/FOR qualification>
    where <resp> is the variable for which the index maximum is to be computed;
                <par> is a parameter where the index maximum value is saved;
    and where the <SUBSET/EXCEPT/FOR qualification> is optional.
Examples:
    LET K1 = INDEX MAXIMUM Y1
Note:
    Dataplot statistics can be used in a number of commands. For details, enter

Default:
    None
Synonyms:
    None
Related Commands:
    INDEX MINIMUM = Compute the index for the minimum value of a variable.
    INDEX EXTREME = Compute the index for the most extreme value of a variable.
    MINIMUM = Compute the minimum value of a variable.
    MAXIMUM = Compute the maximum value of a variable.
    MEAN = Compute the mean of a variable.
    MAX = Library function to compute the maximum of two numbers.
    MIN = Library function to compute the minimum of two numbers.
Applications:
    Data Analysis
Implementation Date:
    2009/2
Program 1:
     
    LET Y1 = NORMAL RANDOM NUMBERS FOR I = 1 1 100
    LET A = INDEX MAXIMUM Y1
        
Program 2:
     
    .  Generate a "table" plot that contains
    .
    .    1) Subset flow category = 1
    .    2) Row denotes flow value
    .       Column denotes cond value
    .    3) Plot symbol denotes algorithm corresponding
    .       to "maximum value"
    .  Step 1: Read the data
    .
    dimension 400 variables
    read mills96.dat flow alg cond flowcat y1 to y14
    retain flow alg cond y1  subset flowcat = 1
    .
    .  Step 2: Perform the relevant cross-tabulations
    .
    let 
    set let cross tabulate collapse
    let ytemp  = cross tabulate group two flow cond
    let xtemp  = cross tabulate group one flow cond
    let maxind = cross tabulate index maximum y1 flow cond
    let ntemp  = size ytemp
    let vsize = 1 for i = 1 1 ntemp
    .
    .  Step 3: Generate the table plot using the symbol plot command
    .
    char 1 2 3 4 5 6 7
    y1label Condition Value
    x1label Flow Value
    xlimits 1 24
    major xtic mark number 24
    minor xtic mark number 0
    ylimits 1 32
    major ytic mark number 32
    minor ytic mark number 0
    tic offset units data
    tic offset 1 1
    .
    symbol plot ytemp xtemp vsize maxind
        
    plot generated by sample program

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Date created: 06/19/2009
Last updated: 11/16/2015

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