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Learn SAS

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Learn SAS

Rick WicklinJuly 21, 2021 0

Operations on lists in SAS/IML

To get better at something, you need to practice. That maxim applies to sports, music, and programming. If you want to be a better programmer, you need to write many programs. This article provides an example of forming the intersection of items in a SAS/IML list. It then provides several

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Advanced Analytics | Analytics | Artificial Intelligence | Learn SAS

Olivia OjedaJuly 15, 2021 0

10 data science job statistics that will blow your mind

In 2012, Data Scientist was dubbed the sexiest job of the 21st century by Harvard Business Review and it is one of the most in-high demand jobs in the world. Data has become a key part of every organization as technology flourishes. As the world become increasingly digitized, businesses are

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Learn SAS | SAS Administrators

Raymond ThomasJuly 15, 2021 0

Going from SAS 9 to SAS Viya and I can hardly contain myself

I am a long-time SAS 9 Administrator, I feel very confident in my understanding of SAS 9 administration. I will admit I don’t know everything, but I have been administering SAS since the days of SAS 9.1.3. I often tell my students I am a general practitioner when it comes

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Analytics | Learn SAS

Rick WicklinJuly 12, 2021 0

The QR algorithm for least-squares regression

In computational statistics, there are often several ways to solve the same problem. For example, there are many ways to solve for the least-squares solution of a linear regression model. A SAS programmer recently mentioned that some open-source software uses the QR algorithm to solve least-squares regression problems and asked

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Learn SAS | Programming Tips

Leonid BatkhanJuly 6, 2021 0

Little known secrets of DO-loops with index variables

SAS' Leonid Batkhan reveals how to use versatile iterative DO loops with index variable pertaining to SAS DATA steps.

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Analytics | Learn SAS

Rick WicklinJune 28, 2021 0

Estimate a bivariate CDF in SAS

This article shows how to estimate and visualize a two-dimensional cumulative distribution function (CDF) in SAS. SAS has built-in support for this computation. Although the bivariate CDF is not used as much as the univariate CDF, the bivariate version is still a useful tool in understanding the probable values of

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Learn SAS

Mark StevensJune 18, 2021 0

Two New SAS® Viya® Programming Certifications

SAS Global Certification is pleased to announce two (yes two!) new SAS Viya programming certifications. Traditional SAS programmers need to migrate their code and data to SAS Viya environments, and there are important skills required to make a successful transition. SAS Viya includes Cloud Analytic Services (CAS), where data is

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Analytics | Artificial Intelligence | Data Management | Learn SAS

Marvio PortelaJune 17, 2021 0

El CEO, el catalizador de la transformación digital de las empresas

La transformación digital es un fenómeno tecnológico y de negocio que continúa con una fuerte inercia dentro de las organizaciones de todas las industrias. Esta inercia ha sido impulsada de forma importante durante la actual pandemia, y se prevé que permanezca como uno de los temas centrales en la agenda

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Communications | Education

Learn SAS | Programming Tips

Leonid BatkhanJune 14, 2021 0

Using SYSTASK and SAS macro loops for massively parallel processing

SAS' Leonid Batkhan presents an implementation of parallel processing by spawning multiple SAS sessions using SYSTASK statements with subsequent synchronization.

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Learn SAS | Students & Educators

Sophia RowlandJune 11, 2021 0

SAS and Microsoft Certifications for Data Scientists

SAS and Microsoft certifications can help with your professional and career development. And now, you can even take certification exams from the comfort of your own home.

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Learn SAS

Shelley Sessoms

Shelley SessomsJune 9, 2021 0

We need your vote! SAS Support Communities are on the 2021 Khoros Kudos awards ballot

Cast your ballots for the SAS Support Communities, nominated for the Khoros Kudos Award: Best-in-Class: Community.

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Analytics | Learn SAS

Rick WicklinJune 9, 2021 0

Rank-based scores and tied values

Many nonparametric statistical methods use the ranks of observations to compute distribution-free statistics. In SAS, two procedures that use ranks are PROC NPAR1WAY and PROC CORR. Whereas the SPEARMAN option in PROC CORR (which computes rank correlation) uses only the "raw" tied ranks, PROC NPAR1WAY uses transformations of the ranks,

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Learn SAS | Students & Educators

Julie BrownJune 8, 2021 0

Everyone can code with SAS® CodeSnaps

SAS® CodeSnaps is an easy, affordable, and engaging tool. All you need is one iPad, the free CodeSnaps app, one Sphero robot, and a problem to solve. Students work collaboratively in teams to generate the code required to move the Sphero; they build a program using the printable coding blocks, scan it with the app, and execute the program to check their logic. CodeSnaps is accessible and appropriate for all learners across all disciplines. Get creative and challenge your students to navigate an obstacle course, find members of a word family, explore the digestive system, or travel the Oregon Trail. Your imagination is your only limitation.

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Learn SAS | Programming Tips

Ron CodyMay 25, 2021 0

Reordering rows and columns in a 2x2 table with SAS® Studio Tasks

In SAS Studio, the ordering of rows and columns in the Table Analysis task are, by default, arranged by the internal ordering of the values used in the table. The table arranges the variables alphabetically or numerically by increasing value. For example, traditional coding uses 1 for Yes and 0

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Learn SAS

Rick WicklinMay 24, 2021 0

How to quickly find documentation for a SAS procedure

I refer to the SAS documentation every day. Usually, I want information about SAS syntax and the statistical formulas and algorithms for various options and statements. Although I have bookmarked common documentation books and chapters, sometimes it is easier to perform an internet search to find information. I've discovered a

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Learn SAS | SAS Events | Students & Educators

Trent SmithMay 20, 2021 0

SAS honors educators and students for excellence in analytics and data science

The demand for people with analytics and data science skills continues to outpace supply – and SAS skills are among the most prized. Through programs such as the new  SAS Academic Specialization, the company is building a sustainable pool of data science and analytics talent. At the virtual SAS Global Forum 2021, the company recognized

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Advanced Analytics | Analytics | Data Management | Learn SAS

Victoria SilvaMay 19, 2021 0

Em sessão de demonstração, Brett Wujek mostra como o AutoML pode facilitar os negócios

Brett Wujek, Principal Product Manager do SAS, mostrou detalhadamente o cliclo analítico e como o SAS Viya ajuda a facilitar o modo como os dados podem ser tratados, oferecendo um equilíbrio natural e efetivo entre os recursos de automação e a interação humana. Wujek frisou a importância da interação humana

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Brazilian Portuguese

Learn SAS | Programming Tips

Rick WicklinMay 19, 2021 0

Implement a product function in SAS

A SAS programmer noticed that there is not a built-in function in the SAS DATA step that computes the product for each row across a specified set of variables. There are built-in functions for various statistics such as the SUM, MAX, MIN, MEAN, and MEDIAN functions. But no DATA step

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Analytics | Learn SAS

Rick WicklinMay 17, 2021 0

Standardized regression coefficients in PROC GLIMMIX

I previously wrote about how to understand standardized regression coefficients in PROC REG in SAS. You can obtain the standardized estimates by using the STB option on the MODEL statement in PROC REG. Several readers have written to ask whether I could write a similar article about the STDCOEF option

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Analytics | Learn SAS | Programming Tips

Rick WicklinMay 12, 2021 0

Nonstandard ways to standardize variables

You can standardize a numerical variable by subtracting a location parameter from each observation and then dividing by a scale parameter. Often, the parameters depend on the data that you are standardizing. For example, the most common way to standardize a variable is to subtract the sample mean and divide

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Learn SAS | Programming Tips

Rick WicklinMay 10, 2021 0

Odani's truism for fractions that are near each other

Odani's truism is a mathematical result that says that if you want to compare the fractions a/b and c/d, it often is sufficient to compare the sums (a+d) and (b+c) rather than the products a*d and b*c. (All of the integers a, b, c, and d are positive.) If you

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Learn SAS | Programming Tips

Rick WicklinMay 5, 2021 0

Odani's truism: A probabilistic way to compare fractions

Quick! Which fraction is bigger, 40/83 or 27/56? It's not always easy to mentally compare two fractions to determine which is larger. For this example, you can easily see that both fractions are a little less than 1/2, but to compare the numbers you need to compare the products 40*56

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Analytics | Learn SAS

Rick WicklinMay 3, 2021 0

Examples of using the Hoeffding D statistic

A previous article discusses the definition of the Hoeffding D statistic and how to compute it in SAS. The letter D stands for "dependence." Unlike the Pearson correlation, which measures linear relationships, the Hoeffding D statistic tests whether two random variables are independent. Dependent variables have a Hoeffding D statistic

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Learn SAS | Programming Tips

Rick WicklinApril 26, 2021 0

On passing a list to a SAS/IML module

SAS/IML programmers often create and call user-defined modules. Recall that a module is a user-defined subroutine or function. A function returns a value; a subroutine can change one or more of its input arguments. I have written a complete guide to understanding SAS/IML modules, which contains many tips for working

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Analytics | Learn SAS

Rick WicklinApril 21, 2021 0

Compute bivariate ranks

Ranking is a fundamental concept in statistics. Ranks of univariate data are used by statisticians to estimate statistics such as percentiles (quantiles) and empirical distributions. A more advanced use is to compute various rank-based measures of correlation or association between pairs of variables. For example, ranks are used to compute

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Analytics | Learn SAS

Rick WicklinApril 19, 2021 0

Compute tied ranks

The ranks of a set of data values are used in many nonparametric statistics and statistical tests. When you request a statistic or nonparametric test in SAS, the procedure will automatically compute the ranks that are needed. However, sometimes it is useful to know how to compute the ranks yourself.

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Data Visualization | Learn SAS

Rick WicklinApril 14, 2021 0

Overlay other graphs on a bar chart with PROC SGPLOT

It can be frustrating to receive an error message from statistical software. In the early days of the SAS statistical graphics (SG) procedures, an error message that I dreaded was ERROR: Attempting to overlay incompatible plot or chart types. This error message appears when you attempt to use PROC SGPLOT

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Data Visualization | Learn SAS

Rick WicklinApril 12, 2021 0

3 reasons to prefer a horizontal bar chart

Most introductory statistics courses introduce the bar chart as a way to visualize the frequency (counts) for a categorical variable. A vertical bar chart places the categories along the horizontal (X) axis and shows the counts (or percentages) on the vertical (Y) axis. The vertical bar chart is a precursor

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Data Visualization | Learn SAS

Rick WicklinMarch 29, 2021 0

Identify influential observations in regression models

A previous article discusses how to interpret regression diagnostic plots that are produced by SAS regression procedures such as PROC REG. In that article, two of the plots indicate influential observations and outliers. Intuitively, an observation is influential if its presence changes the parameter estimates for the regression by "more

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Learn SAS | Programming Tips

Leonid BatkhanMarch 24, 2021 0

How to conditionally stop SAS code execution and gracefully terminate SAS session

SAS' Leonid Batkhan reveals a fuss-free way to halt SAS program execution and terminate SAS session in batch-processing scenarios.

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