Axis Labels

XCHART 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 DATA= process

Vertical HISTORY= subgroup mean variable

Vertical TABLE= _SUBX_

If you specify the TRENDVAR= option, you can provide distinct labels for the vertical axes of the $\bar{X}$ and trend 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 trend chart.

For example, the following sets of statements specify the label Residual Mean for the vertical axis of the $\bar{X}$ chart and the label Fitted Mean for the vertical axis of the trend chart:

   proc shewhart data=toolwear;
      xchart diameter*hour / split    = '/'
                             trendvar = fitted ;
      label diameter = 'Residual Mean/Fitted Mean';
   run;

   proc shewhart history=regdata;
      xchart diameter*hour / split    = '/'
                             trendvar = fitted;
      label diamterx = 'Residual Mean/Fitted Mean';
   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	DATA=	process
Vertical	HISTORY=	subgroup mean variable
Vertical	TABLE=	_SUBX_