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Programming Tips

Strengthen your programming skills with tips and techniques from the experts

Data Visualization | Programming Tips

Robert AllisonApril 12, 2017 0

Your mapping toolkit tip #3 - removing internal borders

In recent versions of SAS/Graph, we have been shipping new/updated maps of each country, with 2 levels of detail (such as state & county, or province & division). But what if you only want a map showing the higher level of detail? In this blog post I share my third

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Analytics | Programming Tips

Optimal value of quadratic function of two variables

Rick WicklinApril 12, 2017 0

Quadratic optimization in SAS

At SAS Global Forum last week, I saw a poster that used SAS/IML to optimized a quadratic objective function that arises in financial portfolio management (Xia, Eberhardt, and Kastin, 2017). The authors used the Newton-Raphson optimizer (NLPNRA routine) in SAS/IML to optimize a hypothetical portfolio of assets. The Newton-Raphson algorithm

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Data Visualization | Programming Tips

Robert AllisonApril 11, 2017 0

Your mapping toolkit Tip #2 - projecting your map

Have you ever seen a map that just didn't look right to you? Perhaps the map area seemed squished or stretched? Perhaps this was because they used a different map projection than you were accustomed to. Or maybe the map coordinates weren't projected at all. In this blog post I

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Data Visualization | Programming Tips

Robert AllisonApril 10, 2017 0

Your mapping toolkit Tip #1 - reducing border complexity

With the advent of things like car GPS & Google Maps, and a steady supply of nice maps from certain news sources (such as the New York Times), people have finally embraced the idea that mapping data can be very useful. And if you are into data visualization, you have

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Programming Tips

Illustration of the 68-95-99.7 rule

Rick WicklinApril 10, 2017 0

A simple trick to construct symmetric intervals

Many intervals in statistics have the form p ± δ, where p is a point estimate and δ is the radius (or half-width) of the interval. (For example, many two-sided confidence intervals have this form, where δ is proportional to the standard error.) Many years ago I wrote an article

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Advanced Analytics | Learn SAS | Machine Learning | Programming Tips

SASPy Interview

Chris Hemedinger

Chris HemedingerApril 8, 2017 0

Introducing SASPy: Use Python code to access SAS

Thanks to a new open source project from SAS, Python coders can now bring the power of SAS into their Python scripts. The project is SASPy, and it's available on the SAS Software GitHub. It works with SAS 9.4 and higher, and requires Python 3.x. I spoke with Jared Dean

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Data Visualization | Learn SAS | Programming Tips

Robert AllisonApril 6, 2017 0

Drawing paths on a map using SGplot

For those of you who don't have SAS/Graph's Proc GMap, I recently showed how to 'fake' a variety of maps using Proc SGplot polygons. So far I've written blogs on creating: pretty maps, gradient shaded choropleth maps, and maps with markers at zip codes. And now (by special request from

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Programming Tips

Rick WicklinApril 5, 2017 0

Piecewise regression models and spline effects

Most regression models try to model a response variable by using a smooth function of the explanatory variables. However, if the data are generated from some nonsmooth process, then it makes sense to use a regression function that is not smooth. A simple way to model a discontinuous process in

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Data Visualization | Programming Tips

Warren F. KuhfeldApril 4, 2017 0

Consistent Ordering of All Graph Components

This post shows you how to make a bar chart and an X-axis table; ensure consistency in the order of the legend, bar subgroups, and axis table rows; coordinate the colors for each of those components; and drive all the color choices from an attribute map.

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Programming Tips

Rick WicklinApril 3, 2017 0

Print tables in SAS/IML

One of the advantages of the new mixed-type tables in SAS/IML 14.2 (released with SAS 9.4m4) is the greatly enhanced printing functionality. You can control which rows and columns are printed, specify formats for individual columns, and even use templates to completely customize how tables are printed. Printing a table

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Learn SAS | Programming Tips

Leonid BatkhanApril 1, 2017 0

SAS code to prove Fermat's Last Theorem

The full text of Fermat's statement, written in Latin, reads "Cubum autem in duos cubos, aut quadrato-quadratum in duos quadrato-quadratos, et generaliter nullam in infinitum ultra quadratum potestatem in duos eiusdem nominis fas est dividere cuius rei demonstrationem mirabilem sane detexi. Hanc marginis exiguitas non caperet." The English translation is:

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Learn SAS | Programming Tips

Ron CodyMarch 31, 2017 0

Capturing output from any procedure with an ODS OUTPUT statement

There's an old song that starts out, "You Can Get Anything You Want at Alice's Restaurant." Well, maybe you are too young to know that song, but if you’re a SAS users, you’ll be glad to know that you can capture anything produced by any SAS procedure (even if the

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Learn SAS | Programming Tips

Jeanne (Hyunjin) ByunMarch 31, 2017 0

비즈니스를 위한 오픈소스

데이터 사이언스와 데이터 사이언티스트에 대한 설전과 토론이 맹렬한 가운데 여러 기업들이 다수의 데이터 사이언티스트 채용 및 고용에 적극적으로 나서면서 데이터 사이언티스트에 대한 수요가 실제 취업 예정자 공급을 추월하기 시작했습니다. 이로 인해 데이터 사이언티스트의 효과적인 유치 및 유지라는 화두 역시 IT 및 비즈니스 커뮤니티에서 뜨거운 감자로 떠올랐습니다. 이러한 상승세에서 기업은 모두가 탐내는

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Programming Tips

SAS/IML lists can store objects of different shapes and sizes

Rick WicklinMarch 29, 2017 0

Lists: Nonmatrix data structures in SAS/IML

Lists are collections of objects. SAS/IML 14.2 supports lists as a way to store matrices, data tables, and other lists in a single object that you can pass to functions. SAS/IML lists automatically grow if you add new items to them and shrink if you remove items. You can also

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Data Management | Learn SAS | Programming Tips

Leonid BatkhanMarch 28, 2017 0

Changing variable type and variable length in SAS datasets

There is a well-known Russian saying that goes “Если нельзя, но очень хочется, то можно.” The English translation of it can span anywhere from “If you can’t, but want it badly, then you can” to “If you shouldn’t, but want it badly, then you should” to “If you may not,

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Advanced Analytics | Analytics | Programming Tips

Phil WeissMarch 27, 2017 0

Using the Robust Analytics Environment of SAS Viya

I have been using the SAS Viya environment for just over six months now and I absolutely love it. As a long-time SAS coder and data scientist I’m thrilled with the speed and greater accuracy I’m getting out of a lot of the same statistical techniques I once used in

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Programming Tips

Chris Hemedinger

Chris HemedingerMarch 27, 2017 0

How many records are in that PROC SQL result?

Did you know that PROC SQL captures the record count for a result set in a special automatic macro variable? When you create a subset of data to include in a report, it's a nice touch to add a record count and other summaries as an eye-catcher to the report

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Programming Tips

Rick WicklinMarch 27, 2017 0

Is ODS graphics enabled? Use automatic macro variables to determine the state of SAS

Did you know that you can check a SAS macro variable to see if ODS graphics is enabled? The other day I wanted to write a SAS program that creates a graph only if ODS graphics is enabled. The solution is to check the SYSODSGRAPHICS macro variable, which is automatically

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Learn SAS | Programming Tips | SAS Events

Kirk Paul LaflerMarch 23, 2017 0

Exploring the content of the DICTIONARIES table and VSVIEW SASHELP view

SAS® users have an easy and convenient way to quickly obtain useful information (referred to as metadata) about their SAS session with a number of read-only SAS DICTIONARY tables or SASHELP views. At any time during a SAS session, information about currently defined system options, libnames, tables, columns and their

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Programming Tips

Rick WicklinMarch 22, 2017 0

Data tables: Nonmatrix data structures in SAS/IML

Prior to SAS/IML 14.2, every variable in the Interactive Matrix Language (IML) represented a matrix. That changed when SAS/IML 14.2 (released with SAS 9.4m4) introduced two new data structures: data tables and lists. This article gives an overview of data tables. I will blog about lists in a separate article.

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Data Visualization | Learn SAS | Programming Tips

Robert AllisonMarch 21, 2017 0

How to create a 'pretty' map with Proc SGplot

If you give an artist some tools, they can create a pretty picture. Sure, they might have a preferred tool - but they can probably do a pretty decent job no matter what you give them (paint, colored pencils, watercolor, charcoal, etc). And creating pretty graphs in SAS is no

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Government | Travel

Data Visualization | Programming Tips

Bari LawhornMarch 20, 2017 0

Create accessible ODS results with SAS or "Why you should be running SAS 9.4M4!"

Let’s look at the term “accessible” and how it relates to the SAS world. Accessible output is output that can be read by a screen reader to someone with low or no vision, visualized by someone with low vision or color blindness, or navigated by someone with limited mobility. In

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Programming Tips

Rick WicklinMarch 20, 2017 0

Discover information about SAS formats... programmatically

SAS formats are very useful and can be used in a myriad of creative ways. For example, you can use formats to display decimal values as a fraction. However, SAS supports so many formats that it is difficult to remember details about the format syntax, such as the default field

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Analytics | Programming Tips

Steven SoberMarch 17, 2017 0

Collaborative distributed data management with open source

Editor’s note: This is the third in a series of articles to help current SAS programmers add SAS Viya to their analytics skillset. In this post, Advisory Solutions Architect Steven Sober explores how to accomplish distributed data management using SAS Viya. Read additional posts in the series. In my last article I

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Analytics | Programming Tips

Steven SoberMarch 16, 2017 0

Collaborative distributed data management using SAS Viya

Editor’s note: This is the second in a series of articles to help current SAS programmers add SAS Viya to their analytics skillset. In this post, Advisory Solutions Architect Steven Sober explores how to accomplish distributed data management using SAS Viya. Read additional posts in the series. This article in the SAS

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Programming Tips

Rick WicklinMarch 15, 2017 0

LEAVE and CONTINUE: Two ways to control the flow in a SAS DO loop

SAS programmers who have experience with other programming languages sometimes wonder whether the SAS language supports statements that are equivalent to the "break" and "continue" statements in other languages. The answer is yes. The LEAVE statement in the SAS DATA step is equivalent to the "break" statement. It provides a

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Programming Tips

Rick WicklinMarch 13, 2017 0

Find your birthday in the digits of pi

It is time for Pi Day, 2017! Every year on March 14th (written 3/14 in the US), geeky mathematicians and their friends celebrate "all things pi-related" because 3.14 is the three-decimal approximation to pi. This year I use SAS software to show an amazing fact: you can find your birthday

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Programming Tips

Rick WicklinMarch 10, 2017 0

Find a pattern in a sequence of digits

I recently needed to solve a fun programming problem. I challenge other SAS programmers to solve it, too! The problem is easy to state: Given a long sequence of digits, can you write a program to count how many times a particular subsequence occurs? For example, if I give you

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Analytics | Data Visualization | Programming Tips

Bobbie WagonerMarch 8, 2017 0

Calculating standard deviation of a measure in Visual Analytics Designer

Several months ago, I posted a blog about calculating moving averages for a measure in the Visual Analytics Designer. Soon after that, I was asked about calculating not only the average, but also the standard deviation over a period of months, when the data might consist of one or more

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