calc_time_diff

Calculation of a time difference between time points in a vector <code>x</code> and
a specific start date <code>d_start</code> in month (days or years).

The production of certified reference materials (CRMs) requires
various statistical tests depending on the task and recorded data to ensure
that reported values of CRMs are appropriate.
Often these tests are performed according to the procedures described in
'ISO GUIDE 35:2017'. The 'eCerto' package contains a 'Shiny' app which
provides functionality to load, process, report and backup data recorded
during CRM production and facilitates following the recommended procedures.
It is described in Lisec et al (2023) <doi:10.1007/s00216-023-05099-3> and
can also be accessed online <https://apps.bam.de/shn00/eCerto/> without
package installation.

Jan Lisec

eCerto

Statistical Tests for the Production of Reference Materials

Frederik Kreß

calc_time_diff function

<dl><dt>x</dt>
<dd>A vector of dates or character in format 'yyyy-mm-dd'.</dd>
<dt>d_start</dt>
<dd>A specific start date (if unspecified the minimum of x will be used to ensure positive values).</dd>
<dt>type</dt>
<dd>You may specify 'year' or 'day' instead of month here.</dd>
<dt>origin</dt>
<dd>The origin used.</dd>
<dt>exact</dt>
<dd>Function will return exact values instead of full month and year if this is set to TRUE.</dd></dl>

Arguments

Calculate time differences for suitable vectors. — calc_time_diff

<dl>

<dt>x</dt>
<dd>A vector of dates or character in format 'yyyy-mm-dd'.</dd>


<dt>d_start</dt>
<dd>A specific start date (if unspecified the minimum of x will be used to ensure positive values).</dd>


<dt>type</dt>
<dd>You may specify 'year' or 'day' instead of month here.</dd>


<dt>origin</dt>
<dd>The origin used.</dd>


<dt>exact</dt>
<dd>Function will return exact values instead of full month and year if this is set to TRUE.</dd>

</dl>

calc_time_diff: Calculate time differences for suitable vectors.

Description

Usage

Value

Arguments

Examples