Today’s topics

• Strings, regular expressions.
• Scraping website

Announcements

• HW2 due tomorrow 2/8 @ 11:59PM.

FAQs

• Travis CI common issues:
  • Tab in front of commands in Makefile.
  • Space after - for specifying R versions. See complete YAML specs.
  • DESCRIPTION uses Debian control format. See http://r-pkgs.had.co.nz/description.html for details.
  • (Brendon’s question) Skip certain builds: https://docs.travis-ci.com/user/customizing-the-build/#skipping-a-build.