If you are a SAS programmer and use the GROUP= option in PROC SGPLOT, you might have encountered a thorny issue: if you use a WHERE clause to omit certain observations, then the marker colors for groups might change from one plot to another. This happens because the marker colors
I review some fundamental principles of creating axis tables along with graphs that have TYPE=LINEAR or TYPE=DISCRETE axes.
I remember my grandparents talking about how hard things were for them growing up. They would say, “Things were so bad that we had to walk uphill, both ways, in the freezing snow to get to school.” It was always hard for me to relate to these statements because the
Previously, I discussed ways to create a Box Plot with Stat Table and Markers in the linked article. One of the graphs showed a Box Plot of Cholesterol by Death cause along with the display of the actual observations. The main goal for that article was display of statistics with
Last week I wrote about the 10 most popular articles from The DO Loop in 2016. The popular articles tend to be about elementary topics that appeal to a wide range of SAS programmers. Today I present an "editor's choice" list of technical articles that describe more advanced statistical methods
“La Quinta” is Spanish for “next to Denny’s.” -- Mitch Hedberg, comedian Mitch Hedberg's joke resonates with travelers who drive on the US interstate system because many highway exits feature both a La Quinta Inn™ and a Denny's® restaurant within a short distance of each other. But does a
In my last post, I showed you how to generate a word cloud of pdf collections. Word clouds show you which terms are mentioned by your documents and the frequency with which they occur in the documents. However, word clouds cannot lay out words from a semantic or linguistic perspective.
How can you generate data that contains outliers in a simulation study? The contaminated normal distribution is a simple but useful distribution you can use to simulate outliers. The distribution is easy to explain and understand, and it is also easy to implement in SAS. What is a contaminated normal
Yesterday, I published an article on Axis values display, where I mentioned the desire expressed by many users to get x-axis tick values in Hotel text orienttion. The name comes from the way many hotel signs are displayed as shown on the right. Such arrangement of text can also be very
Displaying nicely rendered axis values reduces clutter and makes the graph more readable. With SAS 9.4, we added the ability for splitting x-axis tick values on white space to create a nice and readable x-axis as shown in the graph on the right. It is always a challenge to fit
Out of the bosom of the Air, Out of the cloud-folds of her garments shaken, Over the woodlands brown and bare, Over the harvest-fields forsaken, Silent, and soft, and slow Descends the snow. "Snow-flakes" by Henry Wadsworth Longfellow Happy holidays to all my readers! In my last post I showed
I have a fondness for fractals. In previous articles, I've used SAS to create some of my favorite fractals, including a fractal Christmas tree and the "devil's staircase" (Cantor ) function. Because winter is almost here, I think it is time to construct the Koch snowflake fractal in SAS. A
Browsing on the web, I ran into a simple but visually interesting graph of financial data. Really, it could be any data, but this one showed up under "Financial Graphs". I thought this would give me an opportunity to speak about an interesting new feature added to SERIES plot with
A recent issue of Astronomy magazine mentioned Kepler's third law of planetary motion, which states "the square of a planet's orbital period is proportional to the cube of its average distance from the Sun" (Astronomy, Dec 2016, p. 17). The article included a graph (shown at the right) that shows
One of the key benefits of creating graphs using GTL or SG Procedures is their support of plot layering to create complex graphs and layouts. Most simple graphs can be created by a single plot statement like a Bar Chart. Complex graphs can be created by layering appropriate plot statements to
Do you want to create customized SAS graphs by using PROC SGPLOT and the other ODS graphics procedures? An essential skill that you need to learn is how to merge, join, append, and concatenate SAS data sets that come from different sources. The SAS statistical graphics procedures (SG procedures) enable
A SAS customer asked how to use background colors and a dashed line to emphasize the forecast region for a graph that shows a time series model. The task requires the following steps: Use the ATTRPRIORITY=NONE option on the ODS GRAPHICS statement to make sure that the current ODS style
This article uses graphical techniques to visualize one of my favorite geometric objects: the surface of a three-dimensional torus. Along the way, this article demonstrates techniques that are useful for visualizing more mundane 3-D point clouds that arise in statistical data analysis. Define points on a torus A torus is
Last week a user asked about BY variable group processing for SGAnnotate with SGPLOT procedure. The user provided a simple use case for the question (always a good idea) using the sashelp.class data set. The graph included a display of reference lines for the mean value of height using annotation. The
Rotation matrices are used in computer graphics and in statistical analyses. A rotation matrix is especially easy to implement in a matrix language such as the SAS Interactive Matrix Language (SAS/IML). This article shows how to implement three-dimensional rotation matrices and use them to rotate a 3-D point cloud. Define
SAS Community member @tc (a.k.a. Ted Conway) has found a new toy: ODS Graphics. Using PROC SGPLOT and GTL (Graph Template Language), along with some creative data prep steps, Ted has created several fun examples that show off what you can do with a bit of creativity, some math knowledge,
One request came in for the previous article on Circle link graph, for the addition of arrow heads to indicate the direction of the flow. Given that I am using a SERIES plot to render the links, it is relatively easy to add arrow heads to the links as the SERIES
There has been some interest in "Circle Link Graph" diagrams where the nodes are laid out in a circle, with links going from one node in the circle to another. I recall seeing one diagram during the 2014 World Cup Soccer tournament, showing the number of players from one country that
Kennen Sie diese Situation? Sie sollen dringend eine komplexe Auswertung fertig stellen. Die Daten wurden zu spät geliefert und die Qualität und Struktur der Daten waren weit vom erwarteten Standard entfernt. Der Zeitdruck der Ergebnispräsentation ist groß, und Ihr SAS Programm tut immer noch nicht genau das, was Sie als
Like unexpectedly seeing this beautiful bird in nature, SAS has tons of free goodies you might be surprised to encounter as you explore your software. A user asked me how to find products licensed at their workplace and that's how this informative blog got started. While individual organizations may have
A Spider Plot is another way of presenting the Change from Baseline for tumors for each subject in a study by week. The plot can be classified by response and stage. Another way of displaying Tumor Response data was discussed earlier in the article on Swimmer Plot. This article is prompted
I've written several articles about scatter plot smoothers: nonparametric regression curves that reveal small- and large-scale features of a response variable as a function of an explanatory variable. However, there is another kind of "smoothness" that you might care about, and that is the apparent smoothness of curves and markers
Over the past few weeks I have heard about the "Consort Diagram". This was mentioned in a Communities article, and also by a couple of users separately. This topic was also covered by Anusha Mallavarapu and Dean Shults from Cytel in a poster at PhUSE 2016 as shown on the
A previous post discusses how the loess regression algorithm is implemented in SAS. The LOESS procedure in SAS/STAT software provides the data analyst with options to control the loess algorithm and fit nonparametric smoothing curves through points in a scatter plot. Although PROC LOESS satisfies 99.99% of SAS users who
Loess regression is a nonparametric technique that uses local weighted regression to fit a smooth curve through points in a scatter plot. Loess curves are can reveal trends and cycles in data that might be difficult to model with a parametric curve. Loess regression is one of several algorithms in
