Collection of R Tips and Tricks

Click on a Markdown file link (*.md) to navigate to a tip/trick.

• Read CSV file, calculate basic descriptive statistics, fit OLS model (this would be a good place to start for a beginning R user) challenge001OLS.md
• Optimization using numeric vector indexing for creating a variable from a lookup table optimizationVectorIndexing.md
• Mapping Oregon Coordinated Care Organizations [Mapping Oregon CCOs.md](https://github.com/benjamin-chan/RTipsAndTricks/blob/master/Mapping Oregon CCOs.md)
• Fit a random intercept model and then a random slope model CHIPRASurvey.md
• Tests different methods for merging two datasets in R. The winner: "Merge" with datatables. Fast merges.md
• Fast aggregation. FastAggregation.md
• Call SAS program CallSASProgram.md
• Call Stata program TO DO
• Round up a date object to the latest quarter RoundUpToQuarter.md
• Dropping columns from a data table DroppingVariables.md
• Bundling claims into episodes bundleClaims.md
• Read Stata 13 data file ReadStata13.md

For contributors

• make.r is the R script to run individual R Markdown files and create the output Markdown.
• Since this is a public repository, the example should not contain any protected health information (PHI).
• Add a bullet-point to this README.md file for each tip/trick you add.