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

The difference of maximums statistic is also supported for the following commands:
DIFFERENCE OF MAXIMUM PLOT Y1 Y2 X
CROSS TABULATE DIFFERENCE OF MAXIMUM PLOT Y1 Y2 X
BOOTSTRAP DIFFERENCE OF MAXIMUM PLOT Y1 Y2
TABULATE DIFFERENCE OF MAXIMUM Y1 Y2 X
CROSS TABULATE DIFFERENCE OF MAXIMUM Y1 Y2 X
LET Z = CROSS TABULATE DIFFERENCE OF MAXIMUM Y1 Y2 X1 X2


Enter

HELP STATISTIC PLOT
HELP CROSS TABULATE PLOT
HELP BOOTSTRAP PLOT
HELP TABULATE
HELP CROSS TABULATE
HELP CROSS TABULATE (LET)


for more information on these plots and commands.

None

None

MAXIMUM	= Compute the maximum.
MIDMEAN	= Compute the midmaximum.
MEAN	= Compute the mean.
MINIMUM	= Compute the minimum.
QUANTILE	= Compute a quantile.
STANDARD DEVIATION	= Compute the standard deviation.
DIFFERENCE OF MEAN	= Compute the difference of the means.
DIFFERENCE OF MINIMUM	= Compute the difference of the minimums.
DIFFERENCE OF SD	= Compute the difference of standard deviations.
DIFFERENCE OF QUANTILE	= Compute the difference of a quantile.
STATISTICS PLOT	= Generate a statistic versus subset plot.
CROSS TABULATE PLOT	= Generate a statistic versus two subsets plot.
BOOTSTRAP PLOT	= Generate a bootstrap plot.
TABULATE	= Perform a tabulation for a specified statistic.
CROSS TABULATE	= Perform a cross tabulation for a specified statistic.

Data Analysis

3/2003

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