Proc rank computes the ranks of the values of numeric variables. The ranks can then be used to conduct nonparametric statistical tests, among other uses. See also proc univariate and proc npar1way for conducting nonparametric tests. Example:

```
proc rank
data=stuff
out=newstuff /* highly recommended */
descending
fraction
ties=high;
ranks rankedx rankedy;
var x y;
run;
```

The `data=`

option specifies the SAS data set containing the
variables for which ranks are to be computed. If not specified the ranks
will be placed in a data set named DATAn where n is an integer.

The `out=`

option specifies the name of the SAS data set that will
contain the ranks.

The `descending`

option creates rankings with the largest value
having rank 1. The default gives the smallest value rank 1.

The `fraction`

option divides each rank by the number of nonmissing
values taken by the variable.

The `ties=`

option determines how tied values are assigned ranks. The
default `ties=mean`

uses midranks; `ties=low`

uses the smallest of
the corresponding ranks; `ties=high`

uses the largest of the
corresponding ranks. Using `ties=high`

together with the
`fraction`

option produces the values of the empirical distribution
function of the sample.

The `ranks`

statement assigns names to the variables holding the
ranks of variables listed in the `var`

statement. The first name in
the `ranks`

statement is the name of the variable in the `out=`

data set which holds the ranks of the first variable in the `var`

statement, and so on. If the `ranks`

statement is NOT used the
variable names in the original data set are used as the names of
variables in the `out=`

data set with the values replaced by the
ranks.

The `var`

statement specifies the variables in the SAS data set for
which ranks are to be computed. If omitted, all numeric variables in the
data set are ranked. Variables not listed in the `var`

statement are
passed unchanged to the `out=`

data set.
If the `ranks`

statement is NOT used the
variable names in the original data set are used as the names of
variables in the `out=`

data set with the values replaced by the
ranks. If the `ranks`

statement is used the `var`

statement MUST
be used.

Other options are available to compute normal scores and Savage (exponential) scores. A by statement can also be used. For further information see the SAS Procedures Guide.

Copyright © 1997 by Jerry Alan Veeh. All rights reserved.