psyteachr_fqa Ch. 01

Sys.Date()

{base}

return system date

rnorm()

{stats}

generate random sample from normal distribution

data()

{utils}

load specific data set

library()

{base}

load R packages

today()

{lubridate}

return the current date

mean()

{base}

calculate mean of elements of vector

as.Date()

{base}

convert to date

The end!