Axis Labels

XRCHART Statement

Axis Labels

You can specify axis labels by assigning labels to particular variables in the input data set, as summarized in the following table:

Axis Input Data Set Variable

Horizontal all subgroup-variable

Vertical ( $\bar{X}$ chart) DATA= process

Vertical ( $\bar{X}$ chart) HISTORY= subgroup mean variable

Vertical ( $\bar{X}$ chart) TABLE= _SUBX_

You can specify distinct labels for the vertical axes of the $\bar{X}$ and R charts by breaking the vertical axis into two parts with a split character. Specify the split character with the SPLIT= option. The first part labels the vertical axis of the $\bar{X}$ chart, and the second part labels the vertical axis of the R chart.

For example, the following sets of statements specify the label Avg Diameter in mm for the vertical axis of the $\bar{X}$ chart and the label Range in mm for the vertical axis of the R chart:

   proc shewhart data=wafers;
      xrchart diamtr*batch / split = '/' ;
      label diamtr = 'Avg Diameter in mm/Range in mm';
   run;

   proc shewhart history=wafersum;
      xrchart diamtr*batch / split = '/' ;
      label diamtrx = 'Avg Diameter in mm/Range in mm';
   run;

   proc shewhart table=wtable;
      xrchart diamtr*batch / split = '/' ;
      label _SUBX_ = 'Avg Diameter in mm/Range in mm';
   run;

In this example, the label assignments are in effect only for the duration of the procedure step, and they temporarily override any permanent labels associated with the variables.

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Axis	Input Data Set	Variable
Horizontal	all	subgroup-variable
Vertical ( $\bar{X}$ chart)	DATA=	process
Vertical ( $\bar{X}$ chart)	HISTORY=	subgroup mean variable
Vertical ( $\bar{X}$ chart)	TABLE=	_SUBX_