Data Visualization | Learn SAS

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

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Advanced Analytics | Data Visualization | Programming Tips

Rick WicklinMay 17, 2023 0

Compute the silhouette statistic in SAS

A previous article defines the silhouette statistic (Rousseeuw, 1987) and shows how to use it to identify observations in a cluster analysis that are potentially misclassified. The article provides many graphs, including the silhouette plot, which is a bar chart or histogram that displays the distribution of the silhouette statistic

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English

Advanced Analytics | Data Visualization

Kevin ScottMay 16, 2023 0

The Empirical Mode Decomposition for handling non-stationary time series

Empirical Mode Decomposition (EMD) is a powerful time-frequency analysis technique that allows for the decomposition of a non-stationary and non-linear signal into a series of intrinsic mode functions (IMFs). The method was first introduced by Huang et al. in 1998 and has since been widely used in various fields, such as signal processing, image analysis, and biomedical engineering.

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English

Analytics | Data Visualization

Rick WicklinMay 15, 2023 0

What is the silhouette statistic in cluster analysis?

Assigning observations into clusters can be challenging. One challenge is deciding how many clusters are in the data. Another is identifying which observations are potentially misclassified because they are on the boundary between two different clusters. Ralph Abbey's 2019 paper ("How to Evaluate Different Clustering Results") is a good way

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English

Analytics | Cloud | Data Visualization

Paul JonesMay 2, 2023 0

Moving SAS and its data to the cloud (AKA Viya): Making those tricky data decisions

Let's look at the wider landscape and the direction of our customers, partners and SAS as we move SAS applications to be cloud-native in Viya 4.

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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

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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

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English

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

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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

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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

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English

Analytics | Data Visualization | Learn SAS

Rick WicklinJanuary 18, 2023 0

Visualize how parameters in a binary logistic regression model affect the probability of the event

A previous article shows that you can use the Intercept parameter to control the ratio of events to nonevents in a simulation of data from a logistic regression model. If you decrease the intercept parameter, the probability of the event decreases; if you increase the intercept parameter, the probability of

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English

Analytics | Data Visualization | Work & Life at SAS

Andrés Mauricio TorresJanuary 6, 2023 0

Los beneficios de crear una cultura analítica en una organización

“Una red mundial de sensores conectados mediante tecnología inalámbrica a computadoras que analizan los datos, dará a las empresas de todo el mundo una mayor cantidad de información y visibilidad sobre cómo funcionan las personas, los dispositivos y los sistemas”. De todas las definiciones que uno puede encontrar y que

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Spanish

Communications

Advanced Analytics | Analytics | Data Visualization

Ivan Fernando HerreraJanuary 2, 2023 0

El papel de la inteligencia empresarial y analítica en el futuro de las BFSI

Cuando se habla de Big Data en la industria BFSI (como es conocida a nivel internacional la industria de servicios financieros incluyendo banca y seguros), se hace referencia a oportunidades, crecimiento, transformación y futuro. Muy pocas industrias tienen, generan y agregan tantos datos como la de los servicios financieros. Para comenzar, las empresas de esta industria deben entender y analizar más que muchas otras el comportamiento de los clientes, no solo por el cumplimiento de normas, sino también por

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Spanish

Banking

Data Visualization | Learn SAS | Programming Tips

Rick WicklinDecember 7, 2022 0

Art in SAS: Christmas wrapping paper

For Christmas 2021, I wrote an article about palettes of Christmas colors, chiefly shades of red, green, silver, and gold. One of my readers joked that she would like to use my custom palette to design her own Christmas wrapping paper! I remembered her jest when I saw some artwork

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English

Analytics | Data Visualization | Programming Tips

Rick WicklinNovember 16, 2022 0

Optimal linear profile plots in SAS

A profile plot is a way to display multivariate values for many subjects. The optimal linear profile plot was introduced by John Hartigan in his book Clustering Algorithms (1975). In Michael Friendly's book (SAS System for Statistical Graphics, 1991), Friendly shows how to construct an optimal linear profile by using

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English

Data Visualization | Learn SAS | Programming Tips

Rick WicklinNovember 14, 2022 0

Profile plots in SAS

A profile plot is a compact way to visualize many variables for a set of subjects. It enables you to investigate which subjects are similar to or different from other subjects. Visually, a profile plot can take many forms. This article shows several profile plots: a line plot of the

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Analytics | Data Visualization | Learn SAS | Programming Tips

Rick WicklinNovember 7, 2022 0

The area of the convex hull of random points

I recently blogged about how to compute the area of the convex hull of a set of planar points. This article discusses the expected value of the area of the convex hull for n random uniform points in the unit square. The article introduces an exact formula (due to Buchta,

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English

Analytics | Data Visualization | Learn SAS

Rick WicklinOctober 26, 2022 0

Visualize dependencies of missing values

A SAS programmer asked how to create a graph that shows whether missing values in one variable are associated with certain values of another variable. For example, a patient who is supposed to monitor his blood glucose daily might have more missing measurements near holidays and in the summer months

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English

Data Visualization | Programming Tips

Cindy WangOctober 14, 2022 0

Export a Visual Analytics report using REST APIs

In my previous blog Programmatically export a Visual Analytics report to PDF - SAS Users, I use the SAS Visual Analytics SDK to export a report to PDF, which is quite simple if we have basic knowledge with JavaScript programming. It works for both the latest version of SAS Viya

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English

Advanced Analytics | Data Management | Data Visualization | Learn SAS | Machine Learning

Suzanne MorgenSeptember 20, 2022 0

3 data scientist jobs and how to land them

The question to ask is no longer, “Do you want to be a data scientist?” But rather, “What kind of data scientist do you want to be?”

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English

Data Visualization | Programming Tips

Dan HeathSeptember 10, 2022 0

Complex Layouts using the SG Procedures

The Graph Template Language (GTL) is a powerful tool for creating a wide range of graphic displays. One feature GTL has is the ability to combine independent plots together into one paneled display. The SG procedures have some limited capabilities in this area; but in this post, I am going

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English

Advanced Analytics | Analytics | Artificial Intelligence | Data Visualization | Machine Learning

Falko SchulzSeptember 7, 2022 0

Analyzing demographics and patterns-of-life using SAS Visual Analytics

The IEEE Visual Analytics Science and Technology (VAST) Challenge provides a great opportunity to validate our software against real-world scenarios using complex data sets. Not only do we learn from these projects, but we also send feedback to our development teams to further improve product capabilities for customers.

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English

Banking | Government

Data Visualization

Rob JonesSeptember 2, 2022 0

How to communicate your data effectively with data visualisation

Football has finally come home for the England women’s football team. Now we need a nation of lions and lionesses willing to roar the tones of the lightning seeds. Does anybody know the words? It’s a shame Ella’s goal was not the winner as it was well worthy of winning

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English

Sports & Entertainment

Advanced Analytics | Analytics | Data Management | Data Visualization

Marcos GarciaAugust 29, 2022 0

Data observability generates benefits well beyond migration management

My recent work has focused heavily on migration, especially onto the SAS Viya platform and cloud more generally. Rather unexpectedly during this process, we have found that data observability is becoming increasingly important to customers. They start simply by looking at tracing files, but soon find that it has a

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English

Data Visualization | Programming Tips

Rick WicklinAugust 29, 2022 0

Order the bars in a bar chart with PROC SGPLOT

A SAS programmer was trying to understand how PROC SGPLOT orders categories and segments in a stacked bar chart. As with all problems, it is often useful to start with a simpler version of the problem. After you understand the simpler situation, you can apply that understanding to the more

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English

Data Visualization | Learn SAS | Programming Tips

Rick WicklinAugust 24, 2022 0

How to stagger labels on an axis in PROC SGPLOT

A SAS programmer asked how to display long labels at irregular locations along the horizontal axis of scatter plot. The labels indicate various phases of a clinical study. This article discusses the problem and shows how to use the FITPOLICY=STAGGER option on the XAXIS or X2AXIS statement to avoid collisions

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English

Analytics | Data Visualization | Learn SAS

Rick WicklinAugust 15, 2022 0

Tukey's ladder of variable transformations

John Tukey was an influential statistician who proposed many statistical concepts. In the 1960s and 70s, he was fundamental in the discovery and exposition of robust statistical methods, and he was an ardent proponent of exploratory data analysis (EDA). In his 1977 book, Exploratory Data Analysis, he discussed a small

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English

Advanced Analytics | Artificial Intelligence | Data Visualization | Machine Learning

Jessica CurtisJuly 29, 2022 0

How to cultivate trust in analytical models and improve forecast adoption

Often the biggest challenge when implementing a successful forecasting process has nothing to do with the analytics. Forecast adoption – incorporating forecasts into decision-making – is just as high a hurdle to overcome as the models themselves. Forecasting is more than analytical models Developing a forecasting process typically begins with

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English

AgTech | Life Sciences | Manufacturing | Retail

Advanced Analytics | Analytics | Cloud | Data Visualization | Machine Learning

Carlos HernándezJuly 26, 2022 0

SAS Viya, transformar los datos en insights para tomar mejores decisiones

Las organizaciones están bastante conscientes de que las cosas pueden cambiar radicalmente en cuestión de semanas. La experiencia de los dos últimos años les ha hecho reconocer la necesidad de tener la capacidad de tomar decisiones inteligentes a partir de datos confiables que puedan llevar a resultados positivos.   En este

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Spanish

Advanced Analytics | Analytics | Data Management | Data Visualization

Ernesto CantuJuly 19, 2022 0

Acelerando un futuro analítico para manufactura en América Latina

A medida que nos acercamos a un nuevo año, los temas de productividad y optimización para operar en un  contexto volátil e incierto seguirán siendo una prioridad para los ejecutivos de todos los sectores de la industria, y manufactura no es la excepción. Los datos son un aliado importante para garantizar la resiliencia

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Spanish

Manufacturing