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Programming Tips

Strengthen your programming skills with tips and techniques from the experts

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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Analytics | Programming Tips

Rick WicklinAugust 6, 2018 0

How to score and graph a quantile regression model in SAS

This article shows how to score (evaluate) a quantile regression model on new data. SAS supports several procedures for quantile regression, including the QUANTREG, QUANTSELECT, and HPQUANTSELECT procedures. The first two procedures do not support any of the modern methods for scoring regression models, so you must use the "missing

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Data Management | Data Visualization | Programming Tips

Robert AllisonAugust 2, 2018 0

Cumulative values - "We can do this the easy way, or the hard way..."

In many movies, there is often a scene where the star says "We can do this the easy way, or the hard way" (and the hard way usually involves quite a bit of pain). So it is with interrogations ... and so it is with writing SAS code! Today I'm

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Sports & Entertainment

Data Visualization | Programming Tips

Robert AllisonAugust 1, 2018 0

SAS graphs and Excel data, from Unix!

I started my computer career as a Unix system administrator, and when I began using SAS almost 30 years ago it was only natural that I used it on Unix computers (they were the most powerful/capable computers I had access to at the time). I've picked up a lot of

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Government | Travel

Analytics | Data Visualization | Programming Tips

Robert AllisonJuly 30, 2018 0

What's the most popular language in each US state?

I can recognize several languages when I hear people speaking them (mostly because I lived in the Alexander International Dorm at NC State University). Therefore when I found a map of the most common languages spoken in each US state, it caught my attention, and I decided to try creating my

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Education | Government | Travel

Analytics | Learn SAS | Programming Tips

Rick WicklinJuly 30, 2018 0

Meaningful names for columns of a design matrix

A programmer recently asked a question on a SAS discussion forum about design matrices for categorical variables. He had generated a design matrix by using PROC GLMMOD and wanted to use the design columns in a subsequent procedure. However, the columns were named COL1, COL2, COL3,..., so he couldn't tell

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Analytics | Data Visualization | Programming Tips

Robert AllisonJuly 26, 2018 0

Speed -vs- stability? ... let's graph it!

As you might have guessed from some of my previous blog posts, I'm an avid paddler. I like to paddle boats, and I like to try to go fast! And when I'm considering buying a new boat, it's only natural that I would analyze the data to make an informed

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Sports & Entertainment

Advanced Analytics | Programming Tips

Emily GaoJuly 26, 2018 0

How to tokenize documents into sentences

SAS Visual Analytics includes text parsing actions that can help tokenize sentences, and SAS Visual Text Analytics provides even better, more sophisticated methods. This article contains code samples and cites papers for more details.

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Learn SAS | Programming Tips

Jane EslingerJuly 25, 2018 0

Fun with Dots in PROC REPORT

You should play a little. Add dots. Add color. Your PROC REPORT output does not have to be boring. As a matter of fact, it can be both functional and appealing. Any Unicode value will do, but this blog shows how to use the Unicode value for a dot (filled

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Learn SAS | Programming Tips

Joe FurbeeJuly 25, 2018 0

Using RStudio with SAS Viya

Getting started with SAS Viya and RStudio -- making the connection, and submitting my first commands via CAS actions.

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Programming Tips

Rick WicklinJuly 25, 2018 0

Color cells in a mosaic plot by deviation from independence

Back in SAS 9.3M2 (SAS/STAT 12.1), PROC FREQ introduced mosaic plots to visualize the joint frequencies in a contingency table. By default, the cells in a mosaic plot are colored according to levels of one of the categorical variables in the analysis. However, in 2013 I showed how you can

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Data Visualization | Programming Tips

Robert AllisonJuly 24, 2018 0

Using X-ray glasses to see patterns in your data!

When you were a kid, were you intrigued by the 99-cent X-ray glasses advertised in the back of the comic books? If you ordered those glasses, you were probably disappointed. Now that you're an adult, how would you like to use computer techniques to "X-ray" your data and look for

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Sports & Entertainment

Analytics | Learn SAS | Programming Tips

Rick WicklinJuly 23, 2018 0

How to use the %BOOT and %BOOTCI macros in SAS

Since the late 1990s, SAS has supplied macros for basic bootstrap and jackknife analyses. This article provides an example that shows how to use the %BOOT and %BOOTCI macros. The %BOOT macro generates a bootstrap distribution and computes basic statistics about the bootstrap distribution, including estimates of bias, standard error,

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