specifies the input SAS data set to use. By default, the procedure uses the most recently created SAS data set. The data set specified cannot be a TYPE=CORR, TYPE=COV, or TYPE=SSCP data set.

suppresses the normal display of results. Note that this option temporarily disables the Output Delivery System (ODS); see Chapter 20, Using the Output Delivery System for more information.

specifies the order in which you want the levels of the classification variables (specified in the CLASS statement) to be sorted. This ordering determines which parameters in the model correspond to each level in the data. Note that the ORDER= option applies to the levels for all classification variables. The exception is the default ORDER=FORMATTED for numeric variables for which you have supplied no explicit format. In this case, the levels are ordered by their internal value. Note that this represents a change from previous releases for how class levels are ordered. Prior to SAS 8, numeric class levels with no explicit format were ordered by their BEST12. formatted values, and to revert to the previous ordering you can specify this format explicitly for the affected classification variables. The change was implemented because the former default behavior for ORDER=FORMATTED often resulted in levels not being ordered numerically and usually required the user to intervene with an explicit format or ORDER=INTERNAL to get the more natural ordering.

The ORDER= option can take the following values.

If you omit the ORDER= option, PROC ORTHOREG orders by the external formatted value.

produces an output data set containing the parameter estimates, the BY variables, and the special variables _TYPE_ (value "PARMS"), _NAME_ (blank), and _RMSE_ (root mean squared error).

specifies a singularity criterion for the inversion of the triangular matrix . By default, SINGULAR=10E12.