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Rick WicklinMay 24, 2023 0

How does PROC SGPLOT position labels for polygons?

Labeling objects in graphs can be difficult. SAS has a long history of providing support for labeling markers in scatter plots and for labeling regions on a map. This article discusses how the SGPLOT procedure decides where to put a label for a polygon. It discusses the advantages and disadvantages

English

Learn SAS | Programming Tips

Rick WicklinMay 22, 2023 0

Rank character variables in SAS

SAS supports many ways to compute the rank of a numeric variable and to handle tied values. However, sometimes I need to rank the values in a character categorical variable. For example, the values {"Male", "Female", "Male"} have ranks {2, 1, 2} because, in alphabetical order, "Female" is the first-ranked

English

Advanced Analytics | Analytics | Artificial Intelligence | Learn SAS | Students & Educators

Ariane Liger-BelairMay 10, 2023 0

SAS Spring Campus – le début d’une aventure folle

Finir ses études, c’est aussi la promesse exhilarante d’avoir toute sa vie devant soi et de ne pas savoir ce que la carrière a en réserve pour nous. On prend une seule décision et juste comme ça, on gère l’analytique de l’une des meilleures équipes du rugby au monde. Voilà

French

Learn SAS | Machine Learning

Rick WicklinMay 10, 2023 0

How good is an AI chatbot at SAS programming?

A lot of programmers have been impressed by the ability of ChatGPT, GPT-4, and Bing Chat to write computer programs. Recently, I wrote an article that discusses an elementary programming assignment, called FizzBuzz, which is sometimes used as part of a hiring process to assess a candidate's basic knowledge of

English

Learn SAS | Programming Tips

Rick WicklinMay 8, 2023 0

An interview question for SAS programmers

Recently, I learned about an elementary programming assignment called the FizzBuzz program. Some companies use this assignment for the first round of interviews with potential programmers. A competent programmer can write FizzBuzz in 5-10 minutes, which leaves plenty of time to discuss other topics. If an applicant can't complete the

English

Learn SAS | SAS Events

Chris HemedingerMay 3, 2023 0

Bring your expertise to SAS Explore 2023

SAS Explore 2023 is open for your ideas and submissions! Bring your content ideas to the conference -- your experience and expertise is needed!

English

Data Visualization | Learn SAS

Rick WicklinMay 1, 2023 0

Overlay a curve on a histogram in SAS

In a previous article, I showed how to overlay a density estimate on a histogram by using the Graph Template Language (GTL). However, a SAS programmer asked how to overlay a curve on a histogram when the curve is not a density estimate. In this case, the vertical axis for

English

Analytics | Learn SAS

Sophia RowlandApril 26, 2023 0

Get started with ModelOps now

You can start learning about ModelOps and SAS Model Manager now. Compare the various educational resources provided by SAS according to your learning preference.

English

Data Visualization | Learn SAS

Rick WicklinApril 26, 2023 0

Compatible plot types in SAS

When the SAS statistical graphics (SG) procedures were designed in the early 2000s, a goal was to create a comprehensive Graph Template Language (GTL) and leverage the GTL by using SG procedures that perform common tasks easily without having to write any GTL. This project was hugely successful, and "ODS

English

Learn SAS | Programming Tips

Rick WicklinApril 24, 2023 0

Venn diagrams that illustrate relationships between sets

A previous article discusses how to compute the union, intersection, and other subsets of a pair of sets. In that article, I displayed a simple Venn diagram (reproduced to the right) that illustrates the intersection and difference between two sets. The diagram uses a red disk for one set, a

English

Learn SAS | Programming Tips

Lee Ann DietzApril 21, 2023 0

Public Health Transformation: Ways to use SAS Viya

We demonstrate a few common and essential public health functions using SAS Viya. Our goal is to show the art of the possible within the realm of accessibility.

English

Learn SAS | Programming Tips

Rick WicklinApril 19, 2023 0

The joy of sets

The fundamental operations on sets are union, intersection, and set difference, all of which are supported directly in the SAS IML language. While studying another programming language, I noticed that the language supports an additional operation, namely the symmetric difference between two sets. The language also supports query functions to

English

Analytics | Learn SAS | Programming Tips

Rick WicklinApril 17, 2023 0

Should you use the Wald confidence interval for a binomial proportion?

The "Teacher’s Corner" of The American Statistician enables statisticians to discuss topics that are relevant to teaching and learning statistics. Sometimes, the articles have practical relevance, too. Andersson (2023) "The Wald Confidence Interval for a Binomial p as an Illuminating 'Bad' Example," is intended for professors and masters-level students in

English

Analytics | Learn SAS | Students & Educators | Work & Life at SAS

Ariane Liger-BelairApril 11, 2023 0

SAS Spring Campus – une transition en douceur vers la vie professionnelle

Vous vous rappelez ce premier jour du reste de votre vie professionnelle ? Vous avez fini les cours, les examens, ces années d’organisation libre. Tout d’un coup, vous devez intégrer une entreprise. Comprendre le fonctionnement du monde corporate, avec toutes ses particularités. Cela peut être source d’angoisse – et c’est la

English | French

Analytics | Learn SAS

Rick WicklinApril 3, 2023 0

Why use rank correlation?

A previous article discusses rank correlation and lists some advantages of using rank correlation. However, the article does not show examples where an analyst might prefer to report the rank correlation instead of the traditional Pearson product-moment correlation. This article provides three examples where the rank correlation is a better

English

Learn SAS | Programming Tips

Rick WicklinMarch 29, 2023 0

Using SAS to solve an introductory programming assignment

I recently discussed introductory programming with a colleague who teaches Python at a university. He told me about the following introductory programming assignment: Let N be an integer parameter in the range [1, 9]. For each value of N, find all pairs of one-digit positive integers d1 and d2 that

English

Analytics | Learn SAS | Programming Tips

Rick WicklinMarch 22, 2023 0

Partial correlation: controlling for confounding variables

A data analyst wanted to estimate the correlation between two variables, but he was concerned about the influence of a confounding variable that is correlated with them. The correlation might affect the apparent relationship between main two variables in the study. A common confounding variable is age because young people

English

Learn SAS | Programming Tips

Rick WicklinMarch 20, 2023 0

Estimate a Markov transition matrix from historical data

In a previous article about Markov transition matrices, I mentioned that you can estimate a Markov transition matrix by using historical data that are collected over a certain length of time. A SAS programmer asked how you can estimate a transition matrix in SAS. The answer is that you can

English

Analytics | Learn SAS | Programming Tips

Rick WicklinMarch 15, 2023 0

Fitting a distribution to an expert's opinion: An application of the metalog distribution

Most homeowners know that large home improvement projects can take longer than you expect. Whether it's remodeling a kitchen, adding a deck, or landscaping a yard, big projects are expensive and subject to a lot of uncertainty. Factors such as weather, the availability of labor, and the supply of materials,

English

Analytics | Learn SAS | Programming Tips

Rick WicklinMarch 13, 2023 0

Use the metalog distribution in SAS

A previous article describes the metalog distribution (Keelin, 2016). The metalog distribution is a flexible family of distributions that can model a wide range of shapes for data distributions. The metalog system can model bounded, semibounded, and unbounded continuous distributions. This article shows how to use the metalog distribution in

English

Learn SAS | Programming Tips

Rick WicklinMarch 8, 2023 0

How Newton calculated pi to 16 decimal places

Happy Pi Day! Every year on March 14th (written 3/14 in the US), people in the mathematical sciences celebrate "all things pi-related" because 3.14 is the three-decimal approximation to π ≈ 3.14159265358979.... Modern computer methods and algorithms enable us to calculate 100 trillion digits of π. However, I think it

English

Learn SAS | Programming Tips

Rick WicklinMarch 6, 2023 0

The variance of the sums of variables

Undergraduate textbooks on probability and statistics typically prove theorems that show how the variance of a sum of random variables is related to the variance of the original variables and the covariance between them. For example, the Wikipedia article on Variance contains an equation for the sum of two random

English

Analytics | Learn SAS | Programming Tips

Rick WicklinFebruary 20, 2023 0

Simulate from a bounded distribution that has a specified mean

A SAS programmer asked for help to simulate data from a distribution that has certain properties. The distribution must be supported on the interval [a, b] and have a specified mean, μ, where a < μ < b. It turns out that there are infinitely many distributions that satisfy these

English

Ricardo GalanteFebruary 16, 2023 0

História do SAS LAB na Faculdade de Ciências da Universidade de Lisboa

Origem e benefícios do Laboratório Científico criado pelo SAS, na Faculdade de Ciências da Universidade de Lisboa. No final do ano passado, o SAS Portugal anunciou a criação de um laboratório científico - designado SAS-FCUL Lab - na FCUL - Faculdade de Ciências da Universidade de Lisboa, com o objetivo

Portuguese

Education

Data Visualization | Learn SAS | Programming Tips

Rick WicklinFebruary 8, 2023 0

A random walk inside a heart

SAS programmers love to make special graphs for Valentine's Day. In fact, there is a long history of heart-shaped graphs and love-inspired programs written in SAS! Last year, I added to the collection by showing how a ball bounces on a heart-shaped billiards table. This year, I create a similar

English

Learn SAS | Programming Tips

Rick WicklinFebruary 6, 2023 0

How to use Git to share SAS programs

This article is about how to use Git to share SAS programs, specifically how to share libraries of SAS IML functions. Some IML programmers might remember an earlier way to share libraries of functions: SAS/IML released "packages" in SAS 9.4m3 (2015), which enable you to create, document, share, and use

English

Data Visualization | Learn SAS | Programming Tips

Rick WicklinFebruary 1, 2023 0

Colorblind-safe palettes in SAS

SAS supports the ColorBrewer system of color palettes from the ColorBrewer website (Brewer and Harrower, 2002). The ColorBrewer color ramps are available in SAS by using the PALETTE function in SAS IML software. The PALETTE function supports all ColorBrewer palettes, but some palettes are not interpretable by people with color

English

Data Visualization | Learn SAS | Programming Tips

Rick WicklinJanuary 30, 2023 0

Tips for making colorblind-safe statistical graphs

Did you know that about 8% of the world's men are colorblind? (More correctly, 8% of men are "color vision deficient," since they see colors, but not all colors.) Because of the "birthday paradox," in a room that contains eight men, the probability is 50% that at least one is

English

Learn SAS | Programming Tips

Rick WicklinJanuary 25, 2023 0

Write to the log from SAS IML programs

I previously discussed how to use the PUTLOG statement to write a message from the DATA step to the log in SAS. The PUTLOG statement is commonly used to write notes, warnings, and errors to the log. This article shows how to use the PRINTTOLOG subroutine in SAS IML software

English

Learn SAS | Students & Educators

鈴木徳太January 24, 2023 0

SAS® OnDemand for Academicsがリニューアルしました

2023年を迎えて間も無く1ヶ月が経とうとしていますが、皆様はどのよう新年のスタートをされましたでしょうか。With コロナに向けた取り組みが社会的には広がり、自らが管理する時間が増えた中で、質の良い学習時間を確保することは社会人・学生問わず大変重要なことかと思います。さて、SASでは学習および教育を目的とする方向けに、SAS® OnDemand for Academics (ODA) というアナリティクス・ソフトウェアを無料で提供しています。実は、このSAS ODAですが昨年末にログイン画面のアップグレードが行われ、提供されている各種機能へのアクセス方法がわかりやすくなりました。このブログ記事では、アップグレード後の SAS ODAについて紹介していきます。 ①ホーム画面（中央）画面中央には大きく3つのセクションがあり、それぞれ下記の内容が提供されています。 Code with SAS® Studio すべての教員・学生・個人学習者を対象として、Webサイトにアクセスするだけで使用可能です提供されている”タスク”からGUI的にSASコードを生成可能です（もちろん自分でコーディングすることも可能） SAS Studio上にプログラムファイルの新規作成、既存ファイルのアップロードが可能です（最大5GB）アクセス可能なSASソフトウェア一覧： SAS/STAT® Base SAS® SAS/IML® SAS/OR® SAS/QC® SAS/ETS® Learn SAS Programming Programming 1, Statistics 1といった統計学やプログラミングに関するいくつかのe-learningや、動画教材を提供しています SASソフトウェアや統計解析・機械学習を中心とした基礎的な知識、スキルをe-learningを通じて習得可能なオンライン学習プラットフォームSAS Skill Builder for Studentsを学生を対象として提供しています（大学ドメインのアドレスが必要） SASの認定資格に関するガイドをていきょうしています Collaborate with SAS Communities いくつかのSASに関連するコミュニティ情報が掲載されていますプログラミングや解析にあたっての疑問点、Tipsを共有し、世界中のSASユーザーからコメントをもらうことが可能です ②ホーム画面（右）初期状態では次の5つのアイコンが表示されます。 Files

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Education

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