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MRCHART Statement |
See SHWMR3 in the SAS/QC Sample Library |
This example illustrates various methods for specifying axis labels and other axis features for median and range charts. For further details, see "Labeling Axes".
The charts in Figure 36.2, which are based on the data set DETERGNT introduced in the "Getting Started" section, display default labels for the horizontal and vertical axes. You can specify axis labels by associating labels with the process and subgroup variables as illustrated by the following statements:
title 'Median and Range Charts for Detergent Box Weight'; symbol v=dot c=rose; proc shewhart data=detergnt; mrchart weight*lot / split = '/' cframe = vipb cinfill = ywh coutfill = salmon cconnect = rose; label lot = 'Detergent Lot Number' weight = 'Median in pounds/Range'; run;
The charts are shown in Output 36.2.1. The horizontal axis label is the label associated with the subgroup-variable LOT. The vertical axis label for the median chart, referred to as the primary vertical axis label, is the first portion of the label associated with the process variable WEIGHT, up to but not including the split character, which is specified with the SPLIT= option. The vertical axis label for the range chart, referred to as the secondary vertical axis label, is the second portion of the label associated with WEIGHT.
Output 36.2.1: Customized Axis Labels Using Variable Labelstitle 'Median and Range Charts for Detergent Box Weight'; symbol v=dot; proc shewhart history=detsum; mrchart weight*lot / split = '/'; label lot = 'Detergent Lot Number' weightm = 'Median (pounds)/Range'; run;
The charts are identical to those in Output 36.2.1.
When the input data set is a TABLE= data set, the
vertical axis labels are determined by the
label associated with the subgroup median variable
_SUBMED_.
This is illustrated by the following statements, which
use the data set DTABLE introduced in
Figure 36.7:
title 'Median and Range Charts for Detergent Box Weight'; symbol v=dot; proc shewhart table=dtable; mrchart weight*lot / split = '/'; label lot = 'Detergent Lot Number' _submed_ = 'Median (pounds)/Range'; run;
The charts are identical to those in Output 36.2.1. When you are creating charts on graphics devices, you can use AXIS statements to enhance the appearance of the axes. This method is illustrated by the following statements:
title 'Median and Range Charts for Detergent Box Weight'; symbol v=dot c=rose; proc shewhart data=detergnt; mrchart weight*lot / haxis = axis1 vaxis = axis2 vaxis2 = axis3 cframe = vipb cinfill = ywh cconnect = rose coutfill = salmon; axis1 label=(c=bib f=simplex 'Detergent Lot Number' ); axis2 label=(c=vilg f=simplex 'Median Weight' j=c 'of Sample' ); axis3 label=(c=vilg f=simplex 'Range of' j=c 'Sample' ); run;
The charts are shown in Output 36.2.2.
Output 36.2.2: Customized Axis Labels Using AXIS Statements
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