Time arithmetic

# When in standard format, a string does not need a format spefication in order
# to be translatable
t0 <- as.POSIXct("2020-02-01 00:00",tz="GMT")
t0

[1] "2020-02-01 GMT"

# Adding 3600 seconds means adding an hour:
t0 + 3600

[1] "2020-02-01 01:00:00 GMT"

# Subtracting seconds may also change the date:
t0 - 1

[1] "2020-01-31 23:59:59 GMT"

# A day is 24 times 3600 seconds
day <- 24*3600
t0 + day

[1] "2020-02-02 GMT"

• R file: time-arithmetic.R
• Rmarkdown file: time-arithmetic.Rmd
• Jupyter notebook file: time-arithmetic.ipynb
• Interactive version of the Jupyter notebook (shuts down after 60s):
  
• Interactive version of the Jupyter notebook (sign in required):