DEX <STATISITC> PLOTName:
This plot graphically shows the following:
The DEX ... PLOT is most commonly used for the mean. However, you can in fact generate this plot for any statistic supported in Dataplot. The primary application of this plot is in the analysis of 2-level full or fractional designs to identify the most important factors. Syntax:
where <y1> ... <y3> is a list of one to three response variables (depending on the requested statistic);
<x1> ... <xk> is a list of one to k factor variables;
<stat> is the desired statistic;
and where the <SUBSET/EXCEPT/FOR qualification> is optional.
For a list of supported statistics, enter HELP STATISTICS.
DEX MEDIAN PLOT Y X1 X2
DEX SD PLOT Y X1 X2 X3
DEX RANGE PLOT Y X1 X2 X3 X4
DEX SD PLOT Y X1 TO X3
DEX MEAN PLOT Y X1 TO X8
To include both 2-term and 3-term interaction effects, enter
To restore the default of main effects only, enter
When interaction terms are requested, the terms are written to file "dpst5f.dat" in the order they are generated on the plot. For example, for three factor variables where both 2-term and 3-term interactions are requested, the following will be written to dpst5f.dat
2002/08: List of supported statistics expanded.
2019/03: Added support for SET DEX STATISTIC PLOT INTERACTION
SKIP 25 READ SHEESLE2.DAT Y X1 X2 X3 X4 . TIC MARK LABEL CASE ASIS LABEL CASE ASIS TITLE CASE ASIS CASE ASIS X1LABEL DISPLACEMENT 12 . CHARACTERS X BLANK LINES SOLID SOLID LET NFACT = 4 XLIMITS 1 NFACT MAJOR XTIC MARK NUMBER NFACT MINOR XTIC MARK NUMBER 0 X1TIC OFFSET 1 1 X1TIC LABEL FORMAT ALPHA X1TIC LABEL CONTENT Weld Plant Speed Shift X1LABEL Factors YLIMITS 20 28 . MULTIPLOT CORNER COORDINATES 0 0 100 100 MULTIPLOT SCALE FACTOR 2 . MULTIPLOT 2 2 Y1LABEL Mean Defects DEX MEAN PLOT Y X1 TO X4 . Y1LABEL Median Defects DEX MEDIAN PLOT Y X1 TO X4 . YLIMITS Y1LABEL Standard Deviation of Defects DEX SD PLOT Y X1 TO X4 . Y1LABEL Range of Defects DEX RANGE PLOT Y X1 TO X4 END OF MULTIPLOT . JUSTIFICATION CENTER MOVE 50 97 TEXT DEX Statistic Plots for SHEESLE2.DATProgram 2:
SKIP 25 READ SHEESLE2.DAT Y X1 TO X4 . TITLE CASE ASIS LABEL CASE ASIS CHARACTERS X BLANK LINES SOLID SOLID . . Generate plots with interaction terms . . Since we want interaction terms, code to -1 and + 1 . LET Z1 = CODE DEX 2-LEVEL X1 LET Z2 = CODE DEX 2-LEVEL X2 LET Z3 = CODE DEX 2-LEVEL X3 . TIC MARK OFFSET UNITS DATA X1TIC MARK OFFSET 1 1 XLIMITS 1 7 MAJOR XTIC MARK NUMBER 7 X1TIC MARK LABEL FORMAT ALPHA X1TIC MARK LABEL CONTENT X1 X2 X3 X1*X2 X1*X3 X2*X3 X1*X2*X3 SET DEX STATISTIC PLOT INTERACTION 3 . Y1LABEL Mean Defective Leads per Hour X1LABEL Factors TITLE DEX Mean Plot with 2- and 3-Term Interactions DEX MEAN PLOT Y Z1 Z2 Z3