Step-by-Step Programming with Base SAS 9.4, Second Edition, 2nd Edition

and various fonts when your site licenses SAS/GRAPH software. You can use PROC

UNIVARIATE to customize the histograms by adding tables with summary statistics

directly on the graphical display. PROC UNIVARIATE also enables you to overlay the

histogram with fitted density curves or kernel density estimates so that you can examine

the underlying distribution of your data.

Input File and SAS Data Set for Examples

The examples in this section use one input file and one SAS data set. For a complete

listing of the input data, see “The YEAR_SALES Data Set” on page 816. The input

file contains the enrollment and exam grades for an introductory chemistry course. The

50 students enrolled in the course attend several lectures, and a discussion section one

day a week. The input file has the following structure:

Abdallah F Mon 46 Anderson M Wed 75

Aziz F Wed 67 Bayer M Wed 77

Bhatt M Fri 79 Blair F Fri 70

Bledsoe F Mon 63 Boone M Wed 58

Burke F Mon 63 Chung M Wed 85

Cohen F Fri 89 Drew F Mon 49

Dubos M Mon 41 Elliott F Wed 85

…more data lines…

Simonson M Wed 62 Smith N M Wed 71

Smith R M Mon 79 Sullivan M Fri 77

Swift M Wed 63 Wolfson F Fri 79

Wong F Fri 89 Zabriski M Fri 89

The input file contains the following values from left to right:

• the student's last name (and first initial if necessary)

• the student's gender (F or M)

• the day of the week for the student's discussion section (Mon, Wed, or Fri)

• the student's first exam grade

The following program creates the GRADES data set that this section uses. This

example shows the first fifteen observations:

options pagesize=60 linesize=80 pageno=1 nodate;

data grades;

infile 'your-input-file';

input Name & $14. Gender : $2. Section : $3. ExamGrade1 @@;

run;

proc print data=grades;

title 'Introductory Chemistry Exam Scores';

run;

options obs=15;

data grades;

input Name &$14. Gender :$2. Section :$3. ExamGrade1 @@;

datalines;

Abdallah F Mon 46 Anderson M Wed 75

Aziz F Wed 67 Bayer M Wed 77

Bhatt M Fri 79 Blair F Fri 70

Input File and SAS Data Set for Examples 553

Bledsoe F Mon 63 Boone M Wed 58

Burke F Mon 63 Chung M Wed 85

Cohen F Fri 89 Drew F Mon 49

Dubos L M Mon 41 Elliott F Wed 85

Farmer F Wed 58 Franklin F Wed 59

Freeman F Mon 79 Friedman M Mon 58

Gabriel M Fri 75 Garcia M Mon 79

Harding M Mon 49 Hazelton M Mon 55

Hinton M Fri 85 Hung F Fri 98

Jacob F Wed 64 Janeway F Wed 51

Jones F Mon 39 Jorgensen M Mon 63

Judson F Fri 89 Kuhn F Mon 89

LeBlanc F Fri 70 Lee M Fri 48

Litowski M Fri 85 Malloy M Wed 79

Meyer F Fri 85 Nichols M Mon 58

Oliver F Mon 41 Park F Mon 77

Patel M Wed 73 Randleman F Wed 46

Robinson M Fri 64 Shien M Wed 55

Simonson M Wed 62 Smith N M Wed 71

Smith R M Mon 79 Sullivan M Fri 77

Swift M Wed 63 Wolfson F Fri 79

Wong F Fri 89 Zabriski M Fri 89

;

Note: Most output in this section uses an OPTIONS statement that specifies

PAGESIZE=40 and LINESIZE=80. Other examples use an OPTIONS statement

with a different line size or page size to make a chart more readable. When the

PAGESIZE= and LINESIZE= options are set, they remain in effect until you reset

the options with another OPTIONS statement, or you end the SAS session.

554 Chapter 31 • Producing Charts to Summarize Variables