Dataplot Vol 2 Vol 1

# DIFFERENCE OF EXTREME

Name:
DIFFERENCE OF EXTREME (LET)
Type:
Let Subcommand
Purpose:
Compute the difference between the extremes for two response variables.
Description:
The extreme is the maximum of the absolute value of the smallest and largest value of a response variable.

For the difference of extremes, the extreme is computed for each of two samples then their difference is taken.

Syntax:
LET <par> = DIFFERENCE OF EXTREME <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 extreme is stored;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.
Examples:
LET A = DIFFERENCE OF EXTREME Y1 Y2
LET A = DIFFERENCE OF EXTREME Y1 Y2 SUBSET X > 1
Note:
Dataplot statistics can be used in a number of commands. For details, enter

Default:
None
Synonyms:
None
Related Commands:
 EXTREME = Compute the extreme. MEAN = Compute the mean. MINIMUM = Compute the minimum. MAXIMUM = Compute the maximum. QUANTILE = Compute a quantile. STANDARD DEVIATION = Compute the standard deviation. DIFFERENCE OF MINIMUM = Compute the difference of the minimums. DIFFERENCE OF MAXIMUM = Compute the difference of the maximums. 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. BOOTSTRAP PLOT = Generate a bootstrap plot. TABULATE = Perform a tabulation for a specified statistic.
Applications:
Data Analysis
Implementation Date:
2003:03
Program:
```SKIP 25
READ IRIS.DAT Y1 TO Y4 X
.
LET A = DIFFERENCE OF EXTREME Y1 Y2
TABULATE DIFFERENCE OF EXTREME Y1 Y2 X
.
XTIC OFFSET 0.2 0.2
X1LABEL GROUP ID
Y1LABEL DIFFERENCE OF EXTREME
CHAR X
LINE BLANK
DIFFERENCE OF EXTREME PLOT Y1 Y2 X
CHAR X ALL
LINE BLANK ALL
BOOTSTRAP DIFFERENCE OF EXTREME PLOT Y1 Y2 X
```
Dataplot generated the following output.
```       *******************************************
**  LET A = DIFFERENCE OF EXTREME Y1 Y2  **
*******************************************

THE COMPUTED VALUE OF THE CONSTANT A             =  0.35000000E+01

**********************************************
**  TABULATE DIFFERENCE OF EXTREME Y1 Y2 X  **
**********************************************

*    Y1       AND Y2
X           *    DIFFERENCE OF EXTREMES
**********************************************
1.00000     *     1.40000
2.00000     *     3.60000
3.00000     *     4.10000

GROUP-ID AND STATISTIC WRITTEN TO FILE DPST1F.DAT
```

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Date created: 03/27/2003
Last updated: 11/09/2015