across

Used inside <code>mutate()</code> or <code>summarise()</code> to apply a function to multiple
columns selected with tidyselect. Returns a named list of expressions.

A minimal columnar query engine with lazy execution on datasets
larger than RAM. Provides 'dplyr'-like verbs (filter(), select(), mutate(),
group_by(), summarise(), joins, window functions) and common aggregations
(n(), sum(), mean(), min(), max(), sd(), first(), last()) backed by a
pure C11 pull-based execution engine and a custom on-disk format ('.vtr').
Reads and writes 'GeoTIFF' (including tiled and 'BigTIFF' layouts) and a
tiled raster format ('.vec') with overview pyramids and time cubes for
larger-than-RAM raster data.

Gilles Colling

vectra

Columnar Query Engine for Larger-than-RAM Data

across function

<dl><dt>.cols</dt>
<dd>Column selection (tidyselect).</dd>
<dt>.fns</dt>
<dd>A function, formula, or named list of functions.</dd>
<dt>...</dt>
<dd>Additional arguments passed to <code>.fns</code>.</dd>
<dt>.names</dt>
<dd>A glue-style naming pattern. Uses <code>{.col}</code> and <code>{.fn}</code>.
Default: <code>"{.col}"</code> if <code>.fns</code> is a single function,
<code>"{.col}_{.fn}"</code> if <code>.fns</code> is a named list.</dd></dl>

Arguments

Apply a function across multiple columns — across

<dl>

<dt>.cols</dt>
<dd>Column selection (tidyselect).</dd>


<dt>.fns</dt>
<dd>A function, formula, or named list of functions.</dd>


<dt>...</dt>
<dd>Additional arguments passed to <code>.fns</code>.</dd>


<dt>.names</dt>
<dd>A glue-style naming pattern. Uses <code>{.col}</code> and <code>{.fn}</code>.
Default: <code>"{.col}"</code> if <code>.fns</code> is a single function,
<code>"{.col}_{.fn}"</code> if <code>.fns</code> is a named list.</dd>

</dl>

across: Apply a function across multiple columns

Description

Usage

Value

Arguments

Examples