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Search Results: styleattrs (149)

Data Visualization | Learn SAS

Rick WicklinJune 13, 2018 0

Attrs, attrs, everywhere: The interaction between ATTRPRIORITY, CYCLEATTRS, and STYLEATTRS in ODS graphics

If you use PROC SGPLOT to create ODS graphics, "ATTRS" are everywhere. ATTRS is an abbreviation of "attributes." Most options that change the attributes of a graphical element end with the ATTRS suffix. For example, the MARKERATTRS option modifies attributes of markers, the LINEATTRS option modifies attributes of lines, and

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Analytics | Learn SAS

Rick WicklinAugust 5, 2024 0

Poisson regression in SAS

This article demonstrates how to use PROC GENMOD to perform a Poisson regression in SAS. There are different examples in the SAS documentation and in conference papers, but I chose this example because it uses two categorical explanatory variables. Therefore, the Poisson regression can be visualized by using a contingency

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Advanced Analytics | Data Visualization

Kevin ScottMay 24, 2024 0

Identifying time delays in batch manufacturing for accurate anomaly detection

Batch manufacturing involves producing goods in batches rather than in a continuous stream. This approach is common in industries such as pharmaceuticals, chemicals, and materials processing, where precise control over the production process is essential to ensure product quality and consistency. One critical aspect of batch manufacturing is the need to manage and understand inherent time delays that occur at various stages of the process.

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Data Visualization | Learn SAS | Programming Tips

Rick WicklinMay 6, 2024 0

Visualize patterns of missing values

Years ago, I wrote an article that showed how to visualize patterns of missing data. During a recent data visualization talk, I discussed the program, which used a small number of SAS IML statements. An audience member asked whether it is possible to construct the same visualization by using only

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Programming Tips

Chris Hemedinger

Chris HemedingerApril 3, 2024 0

Through the years: SAS Enterprise Guide versions

My colleague Rick Wicklin maintains a nifty chart that shows the timeline of SAS releases since Version 8. A few of you asked if I could post a similar chart for SAS Enterprise Guide. Here it is. Like Rick, I used new features in SAS 9.4 to produce this chart

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Analytics | Data Visualization | Programming Tips

Rick WicklinNovember 27, 2023 0

An example of finite-precision issues in a simple collinearity algorithm

The collinearity problem is to determine whether three points in the plane lie along a straight line. You can solve this problem by using middle-school algebra. An algebraic solution requires three steps. First, name the points: p, q, and r. Second, find the parametric equation for the line that passes

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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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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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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

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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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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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Analytics | Data Visualization | Programming Tips

Rick WicklinJune 29, 2022 0

Compute the multivariate t density function

A previous article shows how to compute the probability density function (PDF) for the multivariate normal distribution. In a similar way, you can compute the density function for the multivariate t distribution. This article discusses the density function for the multivariate t distribution, shows how to compute it, and visualizes

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Analytics | Data Visualization | Learn SAS

Rick WicklinJune 20, 2022 0

Partial leverage plots

For a linear regression model, a useful but underutilized diagnostic tool is the partial regression leverage plot. Also called the partial regression plot, this plot visualizes the parameter estimates table for the regression. For each effect in the model, you can visualize the following statistics: The estimate for each regression

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Data Visualization | Programming Tips

Rick WicklinApril 4, 2022 0

Modify an ODS style to change the missing-value color

Oh, no! Your boss just told you to change the way that SAS displays certain features in graphs, such as missing values. But you have a library of hundreds of SAS programs! Do you need to modify all of your previous programs? Fortunately, the answer is no. SAS provides ODS

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Learn SAS | Programming Tips

Rick WicklinMarch 28, 2022 0

Use a heat map to visualize missing values in longitudinal data

Longitudinal data are measurements for a set of subjects at multiple points in time. Also called "panel data" or "repeated measures data," this kind of data is common in clinical trials in which patients are tracked over time. Recently, a SAS programmer asked how to visualize missing values in a

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Analytics | Data Visualization

Rick WicklinDecember 13, 2021 0

A principal component analysis of color palettes

In a previous article, I visualized seven Christmas-themed palettes of colors, as shown to the right. You can see that the palettes include many red, green, and golden colors. Clearly, the colors in the Christmas palettes are not a random sample from the space of RGB colors. Rather, they represent

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Data Visualization | Learn SAS

Rick WicklinDecember 8, 2021 0

Visualize palettes of colors in SAS

In data visualization, colors can represent the values of a variable in a choropleth map, a heatmap, or a scatter plot. But how do you visualize a palette of colors from the RGB or hexadecimal values of the colors? One way is to use the HEATMAPDISC subroutine in SAS/IML, which

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Data Visualization | Programming Tips

Robert AllisonOctober 22, 2021 0

How to (mis)label a map

This blog post is mostly just a bunch of fun maps ... maps that are labeled (or mislabeled) in various ways, using fun/interesting data. I focus on the 'fun' part, but if you're not careful you might also learn a little about the various ways to add labels to maps

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Data Visualization | Programming Tips

Robert AllisonOctober 15, 2021 0

Captain Kirk travels into space!

Recently, the news has been all abuzz about William Shatner traveling into space. This was a cool event because he's the oldest person who has traveled into space (at 90 years old) ... and he was also the iconic Captain Kirk from the original Star Trek television series. This got

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Data Visualization

Rick WicklinSeptember 7, 2021 0

Remaking a panel of dynamite plots

A colleague spent a lot of time creating a panel of graphs to summarize some data. She did not use SAS software to create the graph, but I used SAS to create a simplified version of her graph, which is shown to the right. (The colors are from her graph.)

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Data Visualization

Rick WicklinSeptember 7, 2021 0

Remaking a panel of dynamite plots

A colleague spent a lot of time creating a panel of graphs to summarize some data. She did not use SAS software to create the graph, but I used SAS to create a simplified version of her graph, which is shown to the right. (The colors are from her graph.)

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Data for Good | Data Visualization | Programming Tips

Robert AllisonAugust 31, 2021 0

Cary NC data - parks and trails

Many cities have Open Data pages. But once you download the data, what can you do with it? This is my fifth in a series of blog posts where I download public data about Cary, NC, and demonstrate how you might analyze that type of data (for Cary, or any

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Data for Good | Data Visualization | Programming Tips

Robert AllisonAugust 23, 2021 0

Cary NC data - population

Many cities have Open Data pages. But once you download the data, what can you do with it? This is my fourth in a series of blog posts where I download public data about Cary, NC, and demonstrate how you might analyze that type of data (for Cary, or any

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Data for Good | Data Visualization | Programming Tips

Robert AllisonAugust 19, 2021 0

Cary NC data - streetlights

Many cities have Open Data pages. But once you download the data, what can you do with it? This is my third in a series of blog posts where I download several datasets from Cary, NC's open data page, and give you a few ideas to get you started on

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Data Visualization | Learn SAS

Rick WicklinAugust 4, 2021 0

Use SAS to create mathematical art

In a previous article, I discussed a beautiful painting called "Phantom’s Shadow, 2018" by the Nigerian-born artist, Odili Donald Odita. I noted that if you overlay a 4 x 4 grid on the painting, then each cell contains a four-bladed pinwheel shape. The cells display rotations and reflections of the pinwheel. The

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Programming Tips

Rick WicklinAugust 2, 2021 0

The art of rotations and reflections

Art evokes an emotional response in the viewer, but sometimes art also evokes a cerebral response. When I see patterns and symmetries in art, I think about a related mathematical object or process. Recently, a Twitter user tweeted about a painting called "Phantom’s Shadow, 2018" by the Nigerian-born artist, Odili

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Data Visualization | Programming Tips

Robert AllisonJune 16, 2021 0

Don't let bad graphs undermine your credibility...

Having earned the Eagle Scout rank in Boy Scouts, I am of course very conservation-minded, and against polluting. I'm also an avid boat paddler and fisherman, and therefore I'm especially concerned about pollution in our rivers, lakes, and oceans. I even volunteered for a week to help survey coral reefs

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Data for Good | Data Visualization | Programming Tips

Robert AllisonMay 7, 2021 0

Creating a paraquat (weed killer) map

I think one of the great uses of analytics and graphics is to show things like cancer clusters on a map. There are many factors that can lead to a higher incidence of diseases in geographical areas, and chemicals are often the culprit. For example, paraquat has been potentially linked

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Data Visualization | Programming Tips

Robert AllisonApril 7, 2021 0

SAS graphs for R programmers - pie charts

This is another in my series of blog posts where I take a deep dive into converting R graphs into SAS graphs. Today we'll be working on pie charts. I know, I know ... you visualization 'purists' might be wagging your finger at me, and saying "pie charts are no good."

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Data Visualization | Programming Tips

Robert AllisonMarch 9, 2021 0

SAS graphs for R programmers - maps from shapefiles

This is another in my series of blog posts where I take a deep dive into converting customized R graphs into SAS graphs. Today we'll be working on shapefile maps ... And what data will we be using this time? Here's a hint - the picture below is the Aurora

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