Posts Tagged ‘ PROC MIXED ’

Example 2014.3: Allow different variances by group

February 27, 2014
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One common violation of the assumptions needed for linear regression is heterscedasticity by group membership. Both SAS and R can easily accommodate this setting. Our data today comes from a real example of vitamin D supplementation of milk. Four sup...
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Benchmark Regression Procedures using OLS Regression

August 18, 2011
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Rick Wicklin discussed in his blog the performance in solving a linear system using SOLVE() function and INV() function from IML. Since regression analysis is an integral part of SAS applications and there are many SAS procedures in SAS/STAT that a...
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Benchmark Regression Procedures using OLS Regression

August 18, 2011
By

Rick Wicklin discussed in his blog the performance in solving a linear system using SOLVE() function and INV() function from IML. Since regression analysis is an integral part of SAS applications and there are many SAS procedures in SAS/STAT that a...
Read more »

Tags: , , , , ,
Posted in SAS | Comments Off

Benchmark Regression Procedures using OLS Regression

August 18, 2011
By

Rick Wicklin discussed in his blog the performance in solving a linear system using SOLVE() function and INV() function from IML. Since regression analysis is an integral part of SAS applications and there are many SAS procedures in SAS/STAT that a...
Read more »

Tags: , , , , ,
Posted in SAS | Comments Off

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