Data Visualization | Programming Tips

Rick WicklinSeptember 20, 2023 0

Avoid domain errors by using Taylor series

The other day I was trying to numerically integrate the function f(x) = sin(x)/x on the domain [0,∞). The graph of this function is shown to the right. In SAS, you can use the QUAD subroutine in SAS IML software to perform numerical integration. Some numerical integrators have difficulty computing

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Data Visualization | Learn SAS | Programming Tips

Rick WicklinSeptember 18, 2023 0

Use PROC SGPLOT to embed a graph inside another graph

Did you know that you can embed one graph inside another by using PROC SGPLOT in SAS? A typical example is shown to the right. The large graph shows kernel density estimates for the distribution of the Cholesterol variable among male and female patients in a heart study. The small

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Analytics | Data Visualization | Programming Tips

Rick WicklinAugust 28, 2023 0

Generate random uniform points on an ellipse

I have previously written about how to efficiently generate points uniformly at random on the surface of a sphere. The method uses a mathematical fact from multivariate statistics: If X is drawn from the uncorrelated multivariate normal distribution, then S = X / ||X|| has the uniform distribution on the

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Analytics | Data Visualization

Anna PriolettiJuly 26, 2023 0

Using Word with SAS for Microsoft 365 as a Marketing Maven

SAS integration with Microsoft Word empowers you to streamline your company’s data analysis, enhance reporting capabilities, and unlock valuable marketing insights, all with the power of SAS Viya.

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Analytics | Data Visualization

Renato LuppiJuly 19, 2023 0

Using PowerPoint with SAS for Microsoft 365 as a Sales Storyteller

From within PowerPoint, you can use the SAS menu available through SAS for Microsoft 365, to access SAS Visual Analytics reports' graphical visuals.

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Analytics | Data Visualization

Briana UllmanJuly 12, 2023 0

Using Outlook with SAS for Microsoft 365 as a Creative Collaborator

By simply logging into SAS Viya from Outlook, data visualizations can give you immediate information about key metrics and business performance through AI-powered explanations.

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English

Analytics | Data Visualization

Sasha KarpinskiJuly 5, 2023 0

Using Excel with SAS for Microsoft 365 as a Data Detective

Using SAS for Microsoft 365, you can enhance your Excel spreadsheets with additional insights from SAS Viya via one seamless integrated experience.

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English

Advanced Analytics | Analytics | Artificial Intelligence | Data Visualization

Ivan Fernando HerreraJune 29, 2023 0

IA en la nube: una nueva era empresarial

Con un tamaño estimado de más de 619 mil millones de dólares para 2023, la computación en la nube es un mercado que cada año crece en tamaño y complejidad, pero que al mismo tiempo aumenta sus posibilidades gracias a las soluciones analíticas y de Inteligencia Artificial que ayudan a

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Communications | Education

Data Visualization | Learn SAS

Rick WicklinMay 30, 2023 0

How to use a log-scale on a histogram

Real-world data often exhibits extreme skewness. It is not unusual to have data span many orders of magnitude. Classic examples are the distributions of incomes (impoverished and billionaires) and population sizes (small countries and populous nations). The readership of books and blog posts show a similar distribution, which is sometimes

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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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