Includes additional variables in the
output data set.
- variable(s)
- identifies one or more variables from the
input data set whose maximum values for groups of observations PROC MEANS
includes in the output data set.
| Interaction: |
Use IDMIN in the
PROC statement to include the minimum value of the ID variables in the output
data set. |
| Tip: |
Use the PRINTIDVARS option
in the PROC statement to include the value of the ID variable in the displayed
output. |
When you specify only one variable in the ID statement,
the value of the ID variable for a given observation is the maximum (minimum)
value found in the corresponding group of observations in the input data set.
When you specify multiple variables in the ID statement, PROC MEANS selects
the maximum value by processing the variables in the ID statement in the order
that you list them. PROC MEANS determines which observation to use from all
the ID variables by comparing the values of the first ID variable. If more
than one observation contains the same maximum (minimum) ID value, PROC MEANS
uses the second and subsequent ID variable values as "tie breakers". In any
case, all ID values are taken from the same observation for any given BY group
or classification level within a type.
See Sorting Orders for Character Variables for information on how PROC MEANS compares character values to
determine the
maximum value.
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
