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Programming Tips

Strengthen your programming skills with tips and techniques from the experts

Programming Tips

Rick WicklinSeptember 17, 2018 0

Linearly spaced vectors in SAS

The SAS/IML language and the MATLAB language are similar. Both provide a natural syntax for performing high-level computations on vectors and matrices, including basic linear algebra subroutines. Sometimes a SAS programmer will convert an algorithm from MATLAB into SAS/IML. Because the languages are not identical, I am sometimes asked, "what

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Data Visualization | Programming Tips

Warren F. KuhfeldSeptember 10, 2018 0

Advanced ODS Graphics: Unicode, tables, and graphs

You can use Unicode to display special characters in SAS output including tables and graphs. With graphs that analytical procedures produce, you might need additional steps.

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Data Visualization | Programming Tips

Robert AllisonSeptember 10, 2018 0

Hurricane Florence - and other category 4 hurricanes that hit NC

Here in North Carolina (NC), we're pretty much resigned to the fact that many of the hurricanes in the Atlantic Ocean are going to visit us. NC sticks out farther into the ocean than most of our neighboring states, and that just makes a tempting target for the hurricanes. But

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Programming Tips

Visualization of L1 distance matrix for items arranged on a 6 x 6 grid

Rick WicklinSeptember 10, 2018 0

Distances on rectangular grids

Given a rectangular grid with unit spacing, what is the expected distance between two random vertices, where distance is measured in the L1 metric? (Here "random" means "uniformly at random.") I recently needed this answer for some small grids, such as the one to the right, which is a 7 x 6

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Data Visualization | Programming Tips

Robert AllisonSeptember 7, 2018 0

Creating industry-specific infographics (eg, 3d printing)

I usually create very technical graphs, that just focus on conveying the information in a concise and straightforward manner (no wasted colors, and nothing to distract you from the data). But sometimes, depending on your audience and the purpose of the graph, you might need to create a graph that

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Data Management | Learn SAS | Programming Tips

Ron CodySeptember 6, 2018 0

New edition of the Cody classic: Learning SAS® by Example

Find out about the new edition of Ron Cody's latest best selling book.

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Programming Tips

Rick WicklinSeptember 6, 2018 0

The continued fraction representation of a rational number

Continued fractions show up in surprising places. They are used in the numerical approximations of certain functions, including the evaluation of the normal cumulative distribution function (normal CDF) for large values of x (El-bolkiny, 1995, p. 75-77) and in approximating the Lambert W function, which has applications in the modeling

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Analytics | Data Visualization | Programming Tips

Robert AllisonSeptember 5, 2018 0

How much land does the government own in each US state?

Many of the most beautiful areas in the US are owned by the government, to preserve them and allow access for everyone to enjoy them. And most US schools are traditionally closed during the summer, which provides families a great opportunity to go visit state and federal lands (parks, forests,

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Programming Tips

Rick WicklinSeptember 4, 2018 0

Store vectors of different lengths in a matrix

In the SAS/IML language, you can only concatenate vectors that have conforming dimensions. For example, to horizontally concatenate two vectors X and Y, the symbols X and Y must have the same number of rows. If not, the statement Z = X || Y will produce an error: ERROR: Matrices

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Analytics | Data Visualization | Programming Tips

Robert AllisonAugust 30, 2018 0

Which keyboard keys do you use most frequently?

If you're good at games like Wheel of Fortune, Scrabble, or Words with Friends, you've probably figured out that certain letters appear more often than others. But do you have a cool way to figure out which letters appear most & least frequently? How about using a computer to plot

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Programming Tips

Chris Hemedinger

Chris HemedingerAugust 28, 2018 0

Manage the current directory within your SAS program

Using relative file paths in your SAS programs? Use the new DLGCDIR function to manage your SAS working directory -- even in SAS Enterprise Guide or SAS Studio -- to ensure your programs are working the way they ought to.

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Learn SAS | Programming Tips | SAS Events

Sian RobertsAugust 28, 2018 0

What your favorite authors are reading: More SAS Global Forum papers chosen by SAS Press authors (Part 2)

This blog post highlights more SAS Global Forum papers chosen by SAS Press authors.

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Programming Tips

Rick WicklinAugust 27, 2018 0

On the assumptions (and misconceptions) of linear regression

A frequent topic on SAS discussion forums is how to check the assumptions of an ordinary least squares linear regression model. Some posts indicate misconceptions about the assumptions of linear regression. In particular, I see incorrect statements such as the following: Help! A histogram of my variables shows that they

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Learn SAS | Programming Tips

Kevin RussellAugust 24, 2018 0

How to COUNT CATs in SAS

How to count words in SAS with the COUNT functions, and concatenate strings by using the CAT functions. Use these tips to modernize your SAS code!

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Data Visualization | Programming Tips

Warren F. KuhfeldAugust 23, 2018 0

Marginal model plots

Marginal model plots display the marginal relationship between the response and each predictor. You can use a SAS autocall macro, %Marginal, to display marginal model plots.

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Programming Tips

Emily GaoAugust 23, 2018 0

Dynamic programming with SAS FCMP

Dynamic programming is a powerful technique to implement algorithms, and is often used to solve complex computational problems. This article shows how to use PROC FCMP to implement the "edit distance" algorithm.

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Analytics | Data Visualization | Programming Tips

Robert AllisonAugust 23, 2018 0

The most disproportionately popular job in each state

Showing the most popular jobs in each state is interesting (as I showed in my previous two blogs 1, 2) ... but not that interesting. How about something a little more quirky?!? ... Let's determine the most disproportionately popular job in each state! Their Map I got the idea for

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Learn SAS | Programming Tips

Sian RobertsAugust 22, 2018 0

What your favorite authors are reading: SAS Press authors highlight SAS Global Forum papers

Three bestselling SAS Press authors feature their favorite papers from SAS Global Forum 2018.

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Learn SAS | Programming Tips

Rick WicklinAugust 22, 2018 0

Standardized regression coefficients

A SAS programmer recently asked how to interpret the "standardized regression coefficients" as computed by the STB option on the MODEL statement in PROC REG and other SAS regression procedures. The SAS documentation for the STB option states, "a standardized regression coefficient is computed by dividing a parameter estimate by

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Analytics | Data Visualization | Programming Tips

Robert AllisonAugust 20, 2018 0

Most common jobs in the US - a small multiples comparison

Using small multiples is a neat way to display a lot of information in a small amount of space. But depending on how deeply you want to analyze and scrutinize the data, you need to be careful in choosing just how small you make your small multiples. Let's look at

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Programming Tips

Rick WicklinAugust 20, 2018 0

Calculators killed the standard statistical table

Video killed the radio star.... We can't rewind, we've gone too far. -- The Buggles (1979) "You kids have it easy," my father used to tell me. "When I was a kid, I didn't have all the conveniences you have today." He's right, and I could say the same

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Data Visualization | Programming Tips

Warren F. KuhfeldAugust 17, 2018 0

Displaying all of the output styles

Have you ever wanted to see examples of all of the output styles that SAS provides? You can run a program and look at the resulting file, styles.html. This post explains more about the styles that you will see including a discussion of attribute priority.

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Data Visualization | Learn SAS | Programming Tips

Robert AllisonAugust 17, 2018 0

What are the most common occupations in each US state?

When I'm at a social gathering, someone always asks what type of work I do. I like to keep my social life separate from my work, therefore I usually give a vague answer such as "software" (and quickly change the topic). How vague or specific is your response? How vague

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Data Visualization | Learn SAS | Programming Tips

SAS KoreaAugust 14, 2018 0

[프로그래밍 팁] 엑셀 데이터 가져오기, 전치하기, 플롯 만들기!

그래프를 만들 때 가장 어려운 작업은 무엇일까요? 바로 데이터를 준비하는 것인데요. 오늘은 엑셀 데이터를 SAS로 가져오고, 전치하고, 첫 열의 값을 데이터 값으로 사용하고, 플롯으로 요약하는 방법을 차례대로 소개해드리고자 합니다. 오늘 예시에서는 학생 대출 채무에 관한 데이터가 사용되는데요. 몇 년 전, 학생 대출 채무가 급증하면서 큰 이슈가 됐었고, 아래는 관련 기사에서 쓰인

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Programming Tips | SAS Events

Lexi HawksAugust 13, 2018 0

A quick introduction to CAS in SAS Viya

Data in the cloud makes it easily accessible, and can help businesses run more smoothly. SAS Viya runs its calculations on Cloud Analytics Service (CAS). David Shannon of Amadeus Software spoke at SAS Global Forum 2018 on his paper, Come On, Baby, Light my SAS Viya: Programming for CAS.

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Data Visualization | Learn SAS | Programming Tips

Robert AllisonAugust 10, 2018 0

Survey says! .... US voters are _________.

Elections are in the news again, therefore I have been on the lookout for interesting graphs. I recently found some graphs of the Census Current Population Survey (CPS) Voting and Registration Supplement data, and tried to improve them. Follow along if you're interested in voter data, or creating better graphs!

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Learn SAS | Programming Tips

Don HendersonAugust 9, 2018 0

Five things you (probably) don’t know you can do with a hash table

Hash tables are a very powerful and flexible data structure. Most SAS applications of hash tables focus on just one of their many powerful facilities: table lookup. Hash tables are a fantastic table lookup tool and their use for that should never be diminished. However, hash tables can do so

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Data Management | Data Visualization | Learn SAS | Programming Tips

Robert AllisonAugust 8, 2018 0

Fact checking a reddit post about GDP

I peruse many different websites to get my news, and I always keep an eye out for good (or bad) presentations of data. I recently saw a posting on reddit claiming "U.S. GDP is greater than the total of all others combined." This news seemed too good to be true

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Data Visualization | Programming Tips

Rick WicklinAugust 8, 2018 0

Plot curves for levels of two categorical variables in SAS

The SGPLOT procedure in SAS makes it easy to create graphs that overlay various groups in the data. Many statements support the GROUP= option, which specifies that the graph should overlay group information. For example, you can create side-by-side bar charts and box plots, and you can overlay multiple scatter

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Data Visualization | Programming Tips

Robert AllisonAugust 6, 2018 0

Choose your markers carefully! (for scatter plots, that is)

There are many quotes with words of wisdom to help you live your life. But sometimes one quote seems to contradict another. For example, "Don't sweat the small stuff." ... and "The devil is in the details." When it comes to creating graphs (and perhaps living my life in general),

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