Regression with inequality constraints on parameters

September 21, 2020
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Regression with inequality constraints on parameters

A previous article discussed how to solve regression problems in which the parameters are constrained to be a specified constant (such as B1 = 1) or are restricted to obey a linear equation such as B4 = –2*B2. In SAS, you can use the RESTRICT statement in PROC REG to

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How to unquote SAS character variable values

September 17, 2020
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How to unquote SAS character variable values

SAS' Leonid Batkhan reviews SAS functionality related to the character strings quoting/unquoting, then dives deep into unquoting SAS character variables.

How to unquote SAS character variable values was published on SAS Users.


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Using SAS® to analyze and visualize a quadratic ANCOVA model

September 16, 2020
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Using SAS® to analyze and visualize a quadratic ANCOVA model

Learn how to use the SGPLOT procedure for graphical representation when you perform statistical analysis for a quadratic ANCOVA model with the GLM procedure.

Using SAS® to analyze and visualize a quadratic ANCOVA model was published on SAS Users.


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Restricted least squares regression in SAS

September 16, 2020
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Restricted least squares regression in SAS

A data analyst recently asked a question about restricted least square regression in SAS. Recall that a restricted regression puts linear constraints on the coefficients in the model. Examples include forcing a coefficient to be 1 or forcing two coefficients to equal each other. Each of these problems can be

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Using REST API to transform a Visual Analytics Report

September 15, 2020
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Using REST API to transform a Visual Analytics Report

There are three types of visualization APIs defined in the SAS Viya REST API reference documetation: Reports, Report Images and Report Transforms. You may have seen the posts on how to use Reports and Report Images. In this post, I'm going to show you how to use the Report Transforms

Using REST...
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Building custom apps on top of SAS Viya, Part Three: Choosing an OAuth flow

September 14, 2020
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Building custom apps on top of SAS Viya, Part Three: Choosing an OAuth flow

This is the third installment of a series focused on discussing the secure integration of custom applications into your SAS Viya platform. I began the series with an example of how a recent customer achieved value-add on top of their existing investments by building a custom app for their employees

Building custom...
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Video: How to Write a Custom Parallel Program in SAS Viya

September 14, 2020
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My 2020 SAS Global Forum paper was about how to write custom parallel programs by using the iml action in SAS Viya 3.5. My conference presentation was canceled because of the coronavirus pandemic, but I recently recorded a 15-minute video that summarizes the main ideas in the paper. One of

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Iterative proportional fitting in SAS

September 10, 2020
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Iterative proportional fitting in SAS

I previously wrote about the RAS algorithm, which is a simple algorithm that performs matrix balancing. Matrix balancing refers to adjusting the cells of a frequency table to match known values of the row and column sums. Ideally, the balanced matrix will reflect the structural relationships in the original matrix.

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Building custom apps on top of SAS Viya, Part Two: Understanding the integration points

September 8, 2020
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Building custom apps on top of SAS Viya, Part Two: Understanding the integration points

Welcome back! Today, I continue with part 2 of my series on building custom applications on SAS Viya. The goal of this series is to discuss securely integrating custom-written applications into your SAS Viya platform. In the first installment of this series, I outlined my experiences on a recent project.

Building custom...
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