Sanjay Matange is R&D Director in the Data Visualization Division responsible for the development and support of the ODS Graphics system, including the Graph Template Language (GTL), Statistical Graphics (SG) procedures, ODS Graphics Designer and related software. Sanjay has co-authored a book on SG Procedures with SAS/PRESS.
Often we want to visualize the relationship between variables over time. The understanding of such data can be improved by viewing the animated graph over time. With SAS 9.4, you can create animated graphs using the new animation options on the OPTIONS statement and the PRINTER destination. A popular example an
The PharmaSUG 2013 conference in Chicago this week was awesome. From the perspective of graphics, there was great interest in using SG Procedures, Designer and GTL for building clinical graphs. It was nice to see many papers by users on how they are using these tools for creating graphs on a daily
The SAS Global Forum conference last week was awesome. From the perspective of graphics, there were more papers from uses on graphics and ODS graphics then in recent times. I will post a summary shortly. One of the interesting papers was "#113-2013 - Creating Clark Error Grid using SAS/GRAPH and Annotate..."
The 2013 SAS Global Forum is around the corner in San Francisco and the anticipation is building. Early indications are that attendee registration is up from last year, and we are looking forward to a great conference starting Sunday, April 28. It is great to see the large and diverse offering
In the previous two articles we discussed Discrete Attribute Maps, and how these can be used to ensure that group attributes like color are consistently mapped to group values regardless of their position in the data. Now, let us take a look at the attributes map that allows you to
Last week I wrote about how you can use the Discrete Attributes Map to ensure that group values with specific names are represented in the graph with specific colors or other visual attributes such as marker symbol or line pattern. This attributes map also supports a special keyword "OTHER" which can be used to
You created a graph of Response over Time by Severity where Severity has three levels, "Severe", "Moderate' and "Mild". How do you ensure that "Severe" is always red in your graph, regardless of the data order? Normally, when creating any graph with a GROUP role, the distinct group values are assigned the style
A frequent question we get from users is how to create a box plot with custom whiskers lengths. Some want to plot the 10th and 90th percentile, while other want the 5th and 95th percentiles. The VBOX statement in the SGPLOT procedure does not provide for custom whiskers. Also, unlike GTL,
SG procedures and GTL use a collision avoidance algorithm to position data labels for a scatter or series plot. This is enabled by default. The label is preferably placed at the top right corner of the marker. The label is moved to one of the eight locations around the marker to
A common request we have been often hearing is for display of the distribution of data as a box plot, along with some detailed information overlaid. For example, one may have ratings data of all the hospitals in a region by different specialty, and you want to view this distribution
A parametric bar chart in SG Procedure and GTL parlance is a simplified version of the regular bar chart, where the data is assumed to be summarized prior to its usage inside the SG procedures or GTL. So, multiple occurrences of the same category and / or group combination is
Last week I was out to the 2nd Conference on Statistical Practice in New Orleans. It was a great opportunity to meet many users of SAS, R and other software and hear about their projects in applied statistics. I will write up my feedback on this conference soon. In the
The Graph Template Language (GTL) provides you the ability to create complex graphical layouts. We have seen how to create a regular grid of cells based on one or more classification variables using the SGPANEL procedure. Each cell contains the same type of plot. This topic was covered in Dan's article on
Recently a reader chimed in with a question on the Do Loop article by Rick Wicklin on how to create a bar chart with percent statistics. Rick used SAS 9.3 and the reader wanted to do the same with SAS 9.2. For the basic (non-grouped) bar chart, the process is the
In my previous article on Adverse Event Timeline Graph, I wrote about how to create the AE timeline using SAS 9.2 code, using VECTOR plot and the MARKERCHAR option in SCATTER plot. I described a better way to place the labels at the lower end of the vectors. SAS 9.3 provides an easier way
Often it is desirable to use special Unicode characters for the tick value names on the axes. However, SG procedures and GTL do not support Unicode strings in SAS data sets. With SAS 9.3, the SGPLOT procedure supports annotation which does support Unicode strings. You can create an annotation data set
A commonly requested graph is a bar chart with response and targets. With SAS 9.3, the SGPLOT procedure supports new "parametric" plot statements called HBARPARM and VBARPARM. These statements are special versions of the HBAR and VBAR statements and they expect summarized data for each category or category+group combination. Also,
Often we have the need to see the data by two different classifiers at the same time, as requested by a recent query on the SAS Communities page. In this example I have simulated a response over time for patients by study and treatment. We want to create series plots
OK, I promise this is the last article on Forest Plots (at least for a while). In the previous article on Subgrouped Forest Plot with Font Attributes, I discussed how to use bold text for subgroup headings. I mentioned that increasing the font size would not work as it would
Just a few days ago our "super-duper tech support trooper" called in asking for the link to the subgrouped Forest Plot with bold headings. She was referring to this Forest Plot with Subgroups I had posted earlier. However, as you can see, while the subgroup values are indented from the subgroup headers, the headers
Naomi Robbins has posted a contest, part 1 of which is to submit alternative representations for the following graph: Clearly, usage of two pie charts to represent the share of the B2B and B2C referrals will invite many responses. To create the graph, I took the data shown in the Pie Charts themselves, so we are using percent
In addition to the Forest Plot with Subgroups, another popular graph in the clinical research space is the Most Frequent Adverse Events Sorted by Relative Risk graph. Recently, I worked with folks from some pharmaceutical companies to contribute SAS code for this graph to the CTSPEDIA resource for statistical graphics. The data for number
A recent question by a user lead led me to experiment with what is often referred to as conditional highlighting. The user wanted to display a bar chart of response by year, where each bar is colored by year, and show a cross hatch pattern on the bars where the
Last week I attended my first SCSUG conference, this one in Houston. Houston, the fourth most populous city in USA, is the world's capitol of the Oil and Gas industry. So it was no surprise I met many attendees from local oil and gas related companies. But, I also met many
In the previous post on Violin Plots, we discussed the process to create custom density plots. This work was done in collaboration with SAS user James Marcus. This is the second installment on the same topic - Creating Density Strip Plots. We will use the same data and process to compute
Over the past month or more, I have been in a conversation with SAS user James Marcus, on creation of some new displays for visual communication of uncertainty. These include display of densities using a "Violin" plot, "Density Strips" and more. With his permission, I can share some of the
Back in February, I posted an article on creating Adverse Event Timeline Graph. In the SAS 9.2 version (first one), one item that was less than ideal was the way to position the AE names to the left of the event. The AE names are displayed using the scatter plot statement
This SESUG conference was a very energetic and rewarding experience, with many user presentations on graphics using SAS/GRAPH and ODS Graphics. One standout presentation for me was on "Data Merging and Exploration to Identify Associations Between Environmental Factors and Disease Outbreaks" by Neeta Shenvi, et. al. The key part of
The Scatter Plot Matrix statement supports a couple of different configurations. The basic is the N x N panel of cells, with each cell showing scatter plots plot for a pair of variables at a time. Here is an example of a 3 x 3 scatter plot matrix for the
During SAS Global Forum 2012, I had conversations with many SAS users who wanted to create Forest Plots. However, there was one new twist. The study names were subgrouped by categories like 'Age', 'Sex', etc., with multiple entries under each subgroup. The name of each study within the subgrouped was indented
