R Data Frames §

Cool functions §

Basic dplyr §

• dplyr::filter(df, condition)
  • e.g. dplyr::filter(df, age<span class="text-highlight">10 & name</span>'yo')
• dplyr::select(df, col_names)
  • e.g. dplyr::select(df, age, -name) -> age but not name
• dplyr::mutate(df, new_col_name = calculation_to_store)
  • e.g. dplyr::mutate(df, age_plus_one = age + 1)

Pipes §

• %>% -> pipe operations together
  • e.g. diamonds %>% filter (price > 100) %>% select(carat, price)
    • -> df will automatically be inserted into next function, no need to supply it again