The UNIVARIATE Procedure

Example 2: Rounding an Analysis Variable and Identifying Extreme Values

Procedure features:

PROC UNIVARIATE statement options:

	FREQ
	NEXTROBS=
	NEXTRVAL=
	ROUND=

ID statement

Data set:

STATEPOP

This example

rounds the values of an analysis variable
generates a frequency table
identifies extreme observations.

Rounding affects all statistical computations. For this example, when the round unit is 1, all the nonnegative values below .5 round to zero.

Program

options nodate pageno=1 linesize=80 pagesize=68;

proc univariate data=statepop freq round=1 nextrobs=2
                nextrval=4;

    var citypop_90;

    id region state;
    title 'United States Census of Population and Housing';
run;

Output

The output includes a message to indicate that the values are rounded to the nearest integer.
The Extreme Observations table lists values of the ID variables, Region and State. Region 4 reports the lowest metropolitan populations, while region 1 and region 4 report the highest populations. The states with the four most extreme observations are AK, WY, NY, and CA.
The Extreme Values table lists the four lowest unique values and the four highest unique values. Because ties occur in the values, the frequency counts of the values are shown.
The Frequency Counts table lists the variable values, the frequencies, the percentages, and the cumulative percentages.

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