formatDate: Format Dates

In mStats: Epidemiological Data Analysis

Description

formatDate converts characters or numbers to dates. is.Date indicates which elements are Dates.

Usage

formatDate(x, format = "dmY", sep = "/", century = NULL)

is.Date(x)

year(x)

month(x)

day(x)

Arguments

x	a character or numeric object
format	only for character vectors:
sep	separator character for date components
century	specify either 2000 or 1900 for two-digit years

Details

dmy represents dd mm YYYY format. In combination with separators from sep, this can change to several date formats. For example, dmy + - convert to dd-mm-yyyy format.

Possible conversions

1. dmy + - >>> dd-mm-yyyy

2. dmy + / >>> dd/mm/yyyy

3. mdy + / >>> mm/dd/yyyy

4. ymd + / >>> yyyy/mm/dd

5. dby + - >>> dd-JAN-yy

6. dby + / >>> dd/JAN/yy

Numeric conversions Origin is set at 1899-12-30.

Author(s)

Email: [e-mail]

Website: https://myominnoo.github.io/

Examples

## convert strings to dates
x <- c("2019-01-15", "2019-01-20", "2019-01-21", "2019-01-22")

# check if it is a Date format
is.Date(x)

## Not run: 
y <- formatDate(x, "Ymd", "-")

# check if it is a Date format
is.Date(y)
y


## another format
x <- c("22-JAN-19", "24-MAR-20")
y <- formatDate(x, "dby", "-")
is.Date(y)
y


## convert numbers to dates
x <- 42705:42710
y <- formatDate(x)
is.Date(y)
y


## get day, month or year
day(y)
month(y)
year(y)

## End(Not run)

mStats documentation built on Nov. 23, 2020, 9:07 a.m.