Calculate RMSE and MAE in R and SAS

July 12, 2013
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[This article was first published on Heuristic Andrew » r-project, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
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Here is code to calculate RMSE and MAE in R and SAS. RMSE (root mean squared error), also called RMSD (root mean squared deviation), and MAE (mean absolute error) are both used to evaluate models. MAE gives equal weight to all errors, while RMSE gives extra weight to large errors.
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