trim_dates

Removes unknown elements from a partial date. For example, <code>"2017-UN-UN"</code>
is trimmed to <code>"2017"</code> and <code>"2017-05-UN"</code> is trimmed to <code>"2017-05"</code>.
Values of <code>"UNKN-UN-UN"</code> are converted to <code>NA</code>. Values where only
the year and day are known are converted to just the year, ie <code>"2017-UN-01"</code>
converts to <code>"2017"</code>. Full dates are not modified.

Provides a set of tools to assist statistical programmers
in validating Study Data Tabulation Model (SDTM) domain data sets.
Statistical programmers are required to validate that a SDTM data set domain
has been programmed correctly, per the SDTM Implementation Guide (SDTMIG) by
'CDISC' (<https://www.cdisc.org/standards/foundational/sdtmig>),
study specification, and study protocol using a process called double
programming. Double programming involves two different programmers
independently converting the raw electronic data cut (EDC) data into a SDTM
domain data table and comparing their results to ensure accurate
standardization of the data. One of these attempts is termed 'production'
and the other 'validation'. Generally, production runs are the official
programs for submittals and these are written in 'SAS'. Validation runs can
be programmed in another language, in this case 'R'.

Stephen Knapp

sdtmval

Validate SDTM Domains

trim_dates function

<dl><dt>dates</dt>
<dd>a character vector of partial dates in the format <code>"UNKN-UN-UN"</code>
(<code>"YYYY-MM-DD"</code>); full dates can also be included</dd>
<dt>input_sep</dt>
<dd>the character that separates date components in the input
vector <code>dates</code>, default is <code>"-"</code></dd></dl>

Arguments

Trim unknown elements in partial dates — trim_dates

<dl>

<dt>dates</dt>
<dd>a character vector of partial dates in the format <code>"UNKN-UN-UN"</code>
(<code>"YYYY-MM-DD"</code>); full dates can also be included</dd>


<dt>input_sep</dt>
<dd>the character that separates date components in the input
vector <code>dates</code>, default is <code>"-"</code></dd>

</dl>

trim_dates: Trim unknown elements in partial dates

Description

Usage

Value

Arguments

See Also

Examples