An easier way to create a calibration plot in SAS

February 20, 2019
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An easier way to create a calibration plot in SAS

Last year I published a series of blogs posts about how to create a calibration plot in SAS. A calibration plot is a way to assess the goodness of fit for a logistic model. It is a diagnostic graph that enables you to qualitatively compare a model's predicted probability of

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An easier way to perform regression with restricted cubic splines in SAS

February 18, 2019
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An easier way to perform regression with restricted cubic splines in SAS

Maybe if we think and wish and hope and pray It might come true. Oh, wouldn't it be nice? The Beach Boys Months ago, I wrote about how to use the EFFECT statement in SAS to perform regression with restricted cubic splines. This is...
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New Performance-Based Certification: Write SAS Code During Your Exam

February 13, 2019
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SAS has worked with our exam delivery partners to integrate a live lab into an exam, which can be delivered anywhere, anytime, on-demand. The post New Performance-Based Certification: Write SAS Code During Your Exam appeared first on SAS Learning Post....
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3 ways to obtain the Hessian at the MLE solution for a regression model

February 13, 2019
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3 ways to obtain the Hessian at the MLE solution for a regression model

When you use maximum likelihood estimation (MLE) to find the parameter estimates in a generalized linear regression model, the Hessian matrix at the optimal solution is very important. The Hessian matrix indicates the local shape of the log-likelihood surface near the optimal value. You...
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Isn’t SAS Romantic?

February 12, 2019
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SAS Press gets in the Valentine's Day spirit. The post Isn’t SAS Romantic? appeared first on SAS Learning Post.
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4 reasons to use PROC PLM for linear regression models in SAS

February 11, 2019
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4 reasons to use PROC PLM for linear regression models in SAS

Have you ever run a regression model in SAS but later realize that you forgot to specify an important option or run some statistical test? Or maybe you intended to generate a graph that visualizes the model, but you forgot? Years ago, your only...
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Convert a text-based measurement to a number in SAS

February 8, 2019
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Convert a text-based measurement to a number in SAS

Regular expressions are a powerful method for finding specific patterns in text. The syntax of regular expressions is intimidating, but once you've solved a few pattern-recognition problems with regex, you'll never go back to your old methods.

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Feature generation and correlations among features in machine learning

February 6, 2019
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Feature generation and correlations among features in machine learning

Feature generation (also known as feature creation) is the process of creating new features to use for training machine learning models. This article focuses on regression models. The new features (which statisticians call variables) are typically nonlinear transformations of existing variables or combinations of...
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Webpage scraping made easy with PROC HTTP

February 5, 2019
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SAS Press author Matt Windham shows you how to use the SAS procedure PROC HTTP to grab raw data from a website. The post Webpage scraping made easy with PROC HTTP appeared first on SAS Learning Post.
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