modify_if

modify_at

Modifies elements of a vector selectively, similar to the functions in <a href="https://CRAN.R-project.org/package=purrr">purrr</a>.
<code>modify_if()</code> applies a predicate function <code>.p</code> to all elements of <code>.x</code>
and applies <code>.f</code> to those elements of <code>.x</code> where <code>.p</code> evaluates to <code>TRUE</code>.
<code>modify_at()</code> applies <code>.f</code> to those elements of <code>.x</code> selected via <code>.at</code>.

Frequently used helper functions and assertions used in
'mlr3' and its companion packages. Comes with helper functions for
functional programming, for printing, to work with 'data.table', as
well as some generally useful 'R6' classes. This package also
supersedes the package 'BBmisc'.

Michel Lang

mlr3misc

Helper Functions for 'mlr3'

Patrick Schratz

modify_if function

<dl><dt>.x</dt>
<dd>(<code><a href="/link/vector()?package=mlr3misc&version=0.15.0" data-mini-rdoc="mlr3misc::vector()">vector()</a></code>).</dd>
<dt>.p</dt>
<dd>(<code>function()</code>) 
Predicate function.</dd>
<dt>.f</dt>
<dd>(<code>function()</code>) 
Function to apply on <code>.x</code>.</dd>
<dt>...</dt>
<dd>(<code>any</code>) 
Additional arguments passed to <code>.f</code>.</dd>
<dt>.at</dt>
<dd>((<code><a href="/link/integer()?package=mlr3misc&version=0.15.0" data-mini-rdoc="mlr3misc::integer()">integer()</a></code> | <code><a href="/link/character()?package=mlr3misc&version=0.15.0" data-mini-rdoc="mlr3misc::character()">character()</a></code>)) 
Index vector to select elements from <code>.x</code>.</dd></dl>

Arguments

Modifies elements of a vector selectively, similar to the functions in <a href='https://CRAN.R-project.org/package=purrr'>purrr</a>.
<code>modify_if()</code> applies a predicate function <code>.p</code> to all elements of <code>.x</code>
and applies <code>.f</code> to those elements of <code>.x</code> where <code>.p</code> evaluates to <code>TRUE</code>.
<code>modify_at()</code> applies <code>.f</code> to those elements of <code>.x</code> selected via <code>.at</code>.

Selectively Modify Elements of a Vector — modify_if

<dl>

<dt>.x</dt>
<dd>(<code><a href='https://rdrr.io/r/base/vector.html'>vector()</a></code>).</dd>


<dt>.p</dt>
<dd>(<code>function()</code>) 
Predicate function.</dd>


<dt>.f</dt>
<dd>(<code>function()</code>) 
Function to apply on <code>.x</code>.</dd>


<dt>...</dt>
<dd>(<code>any</code>) 
Additional arguments passed to <code>.f</code>.</dd>


<dt>.at</dt>
<dd>((<code><a href='https://rdrr.io/r/base/integer.html'>integer()</a></code> | <code><a href='https://rdrr.io/r/base/character.html'>character()</a></code>)) 
Index vector to select elements from <code>.x</code>.</dd>

</dl>

modify_if: Selectively Modify Elements of a Vector

Description

Usage

Arguments

Examples