DIFFERENCE OF MAXIMUM

DIFFERENCE OF MAXIMUM (LET)

Let Subcommand

Compute the difference between the maximums for two response variables.

The maximum is the largest value of a response variable.

For the differeence of maximums, the maximum is computed for each of two samples then their difference is taken.

LET <par> = DIFFERENCE OF MAXIMUM <y1> <y2>
                        <SUBSET/EXCEPT/FOR qualification>
where <y1> is the first response variable;
            <y2> is the first response variable;
            <par> is a parameter where the computed difference of the maximums is stored;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.

LET A = DIFFERENCE OF MAXIMUM Y1 Y2
LET A = DIFFERENCE OF MAXIMUM Y1 Y2 SUBSET X > 1

Dataplot statistics can be used in a number of commands. For details, enter
HELP STATISTICS

None

None

MAXIMUM	= Compute the maximum.
MINIMUM	= Compute the minimum.
MEDIAN	= Compute the median.
QUANTILE	= Compute a quantile.
STANDARD DEVIATION	= Compute the standard deviation.
DIFFERENCE OF MINIMUM	= Compute the difference of the minimums.
DIFFERENCE OF MEDIAN	= Compute the difference of the medians.
DIFFERENCE OF QUANTILE	= Compute the difference of a quantile.
STATISTICS PLOT	= Generate a statistic versus subset plot.
BOOTSTRAP PLOT	= Generate a bootstrap plot.
TABULATE	= Perform a tabulation for a specified statistic.

Data Analysis

2003/03

SKIP 25 
READ IRIS.DAT Y1 TO Y4 X 
. 
LET A = DIFFERENCE OF MAXIMUM Y1 Y2 
TABULATE DIFFERENCE OF MAXIMUM Y1 Y2 X 
. 
XTIC OFFSET 0.2 0.2 
X1LABEL GROUP ID 
Y1LABEL DIFFERENCE OF MAXIMUM 
CHAR X 
LINE BLANK 
DIFFERENCE OF MAXIMUM PLOT Y1 Y2 X 
CHAR X ALL 
LINE BLANK ALL 
BOOTSTRAP DIFFERENCE OF MAXIMUM PLOT Y1 Y2 X  
    

Dataplot generated the following output.

       *******************************************
       **  LET A = DIFFERENCE OF MAXIMUM Y1 Y2  **
       *******************************************
  
  
 THE COMPUTED VALUE OF THE CONSTANT A             =  0.35000000E+01
  
  
       **********************************************
       **  TABULATE DIFFERENCE OF MAXIMUM Y1 Y2 X  **
       **********************************************
  
  
                 *    Y1       AND Y2
     X           *    DIFFERENCE OF MAXIMUMS
 **********************************************
     1.00000     *     1.40000
     2.00000     *     3.60000
     3.00000     *     4.10000
  
       GROUP-ID AND STATISTIC WRITTEN TO FILE DPST1F.DAT