age_numeric: Age conversion: from character to numeric

In DavideMassidda/testing: Psychometric Testing

Age conversion: from character to numeric

Description

Converts ages expressed as years, months and days into approximated numeric values.

Usage

age_numeric(x, units = c("years", "months"), depth = c("days", "months", "years"),
    origin.units = c("years", "months"), use.leap = TRUE)

Arguments

x	Character vector of ages expressed as "years:months:days" (for example: "6:5:7" for six years, six months and seven days). Alternatively, a numeric matrix in which the first column is the value for years, the second column is the value for months and the third column is the value for days. Only the years are mandatory.
units	Character specifying the units of the age in output (years or months).
depth	Character specifying the depth of the age in output (days, months or years).
origin.units	Character specifying the units of the age in input (days, months or years).
use.leap	Logical specifying if consider or ignore leap years.

Details

If origin.unit = "years", the function accept values expressed as: "years", "years:months" and "years:months:days", depending on the depth level. If origin.unit = "months", the function accept values expressed as: "months" and "months:days".

Input values as days=31 and month=12 aren't allowed. When a subject completes all the days included in a month, jump to the following month, setting days=0. Similarly, when a subject completes 12 months of a year, jump to the following year, setting months=0.

Value

The age completed by the subject.

See Also

age_completed, age_character, age_segment

Examples

born <- c("2008-02-17", "2010-08-06", "2008-02-21", "2008-06-25", "2008-04-16", "2009-04-16")
test <- c("2012-05-02", "2011-09-17", "2013-03-09", "2012-01-07", "2013-02-11", "2013-02-11")
(age <- age_completed(born, test, output="character"))
age_numeric(age, units="years")
age_numeric(age, units="months")

DavideMassidda/testing documentation built on Oct. 12, 2023, 4:32 p.m.