The code: data a; input i a $ b $; datalines; 1 a1A b1 1 a1A b1 2 a2 b2 ; run; data b; input i a $ c $; datalines; 1 a1C c1 2 . c2 3 . c3 ; run;...

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The code: data a; input i a $ b $; datalines; 1 a1A b1 1 a1A b1 2 a2 b2 ; run; data b; input i a $ c $; datalines; 1 a1C c1 2 . c2 3 . c3 ; run;...

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Yikes, it's been a while since the last update! So I will try to keep this one short and useful. Most everybody knows there are essentially two ways for tables to be merged in SAS: using the merge statement in the data step and using a join in SQL. ...

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It's often necessary to combine data from two data sets for further analysis. Such merging can be one-to-one, many-to-one, and many-to-many. The most common form is the one-to-one match, which we cover in section 1.5.7. Today we look at a one-to-man...

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In recent weeks, we've explored methods to fit logistic regression models when a state of quasi-complete separation exists. We considered Firth's penalized likelihood approach, exact logistic regression, and Bayesian models using Markov chain Monte Ca...

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This Fall my daughter will be going to kindergarden. So like all other hyper-attentive parents we have started introducing her to the concept of homework. The other night I got out her crayons and introduced her to set theory. After about an hour I ...

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