An introduction to dates in R

Intermediate R for Finance

Lore Dirick

Manager of Data Science Curriculum at Flatiron School

What will you learn?

  • If statements
  • Loops
  • Functions
  • Finance examples
Intermediate R for Finance

Today's date

today <- Sys.Date()
today

"2017-03-14"

class(today)

"Date"
Intermediate R for Finance

Date classes

  • Date
    • Calendar dates
    • "2017-03-14"
  • POSIX - Portable Operating System Interface
    • POSIXct and POSIXlt
    • Date + time + timezone
    • "2017-03-14 10:00:21 EDT"
Intermediate R for Finance

Creating dates

character_date <- "1957-03-04"

class(character_date)

"character"

sp500_birthday <- as.Date(character_date)

sp500_birthday

"1957-03-04"

class(sp500_birthday)

"Date"
Intermediate R for Finance

Let's practice!

Intermediate R for Finance

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