Shewhart Chart With Polygon Star Display
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: SHWSTAR1 */
/* TITLE: Shewhart Chart With Polygon Star Display */
/* PRODUCT: QC */
/* SYSTEM: ALL */
/* KEYS: Shewhart Charts, Star Charts, */
/* PROCS: SHEWHART */
/* DATA: */
/* */
/* MISC: Uses star facility in PROC SHEWHART to display the */
/* relationship between a process variable (paint */
/* index) and six related quality and environmental */
/* variables. */
/* */
/* In this example scaling is based on the minimum */
/* and maximum of the vertex variable across the .*/
/* the subgroups. The second display uses a reference */
/* circle to indicate the maximum. */
/* */
/****************************************************************/
options ps=60 ls=80 nodate;
/* summary data for paint index and related variables */
data stats;
input hour paintinx paintinr paintinn
thick gloss defects dust humid temp;
label hour = 'Run Number'
paintinx = 'Average Paint Index'
thick = 'Paint Thickness'
gloss = 'Paint Gloss'
defects = 'Paint Defects'
dust = 'Dust Level'
humid = 'Room Humidity'
temp = 'Room Temperature' ;
cards;
1 5.8 3.0 5 0.2550 0.6800 0.2550 0.2125 0.1700 0.5950
2 6.2 2.0 5 0.2975 0.5950 0.0850 0.1700 0.2125 0.5525
3 3.7 2.5 5 0.3400 0.3400 0.4250 0.2975 0.2550 0.2125
4 3.2 6.5 5 0.3400 0.4675 0.3825 0.3485 0.2125 0.2125
5 4.7 0.5 5 0.5100 0.4250 0.5950 0.4080 0.5100 0.4675
6 5.2 3.0 5 0.5100 0.3400 0.6800 0.5525 0.5525 0.5525
7 2.6 2.0 5 0.4250 0.0425 0.8500 0.5355 0.5525 0.2550
8 2.1 1.0 5 0.3400 0.0170 0.8075 0.5950 0.5950 0.1700
;
/* pre-specified control limits for paint index */
data mylimits;
length _var_ $ 8
_subgrp_ $ 8
_type_ $ 8 ;
_var_ = 'paintin';
_subgrp_ = 'hour';
_type_ = 'estimate';
_limitn_ = 5;
_sigmas_ = 3;
_lclx_ = 2.395 ;
_mean_ = 3.875 ;
_uclx_ = 5.355 ;
_lclr_ = 0.0 ;
_r_ = 2.5625 ;
_uclr_ = 5.4184 ;
_stddev_ = 1.10171 ;
output;
run;
/*---create chart using default polygon style for stars---*/
symbol1 v=none l=1;
title 'Variables Related to Paint Index';
proc shewhart history=stats limits=mylimits;
xchart paintin * hour /
nolegend
novangle
readlimits
cframe = gray
cconnect = white
cstars = yellow
cinfill = empty
/*---star options---*/
starvertices = ( thick gloss defects dust humid temp )
starstart = '1:00'T
;
run;
/*---wedge style for stars and reference circle---*/
proc shewhart history=stats limits=mylimits;
xchart paintin * hour /
nolegend
novangle
readlimits
cframe = gray
cconnect = white
/*---star options---*/
startype = wedge
starvertices = ( thick gloss defects dust humid temp )
cstars = yellow
cinfill = empty
starcircles = 1.0
lstarcircles = 2
cstarcircles = white
starstart = '1:00'T
;
run;
goptions reset=all;