Debugging in R

Summary

• There are three main indications of a problem/condition: message, warning, error
  • only an error is fatal
• When analyzing a function with a problem, make sure you can reproduce the problem, clearly state your expectations and how the output differs from your expectation
• Interactive debugging tools traceback, debug, browser, trace, and recover can be used to find problematic code in functions
• Debugging tools are not a substitute for thinking!