lead_dt

lag_dt

Find the "next" or "previous" values in a vector.
It has wrapped data.table's <code>shift</code> function.

A toolkit of tidy data manipulation verbs with 'data.table' as the backend.
Combining the merits of syntax elegance from 'dplyr' and computing performance from 'data.table',
'tidyfst' intends to provide users with state-of-the-art data manipulation tools with least pain.
This package is an extension of 'data.table'. While enjoying a tidy syntax,
it also wraps combinations of efficient functions to facilitate frequently-used data operations.

Tian-Yuan Huang

tidyfst

Tidy Verbs for Fast Data Manipulation

lead_dt function

<dl><dt>x</dt>
<dd>A vector</dd>
<dt>n</dt>
<dd>a positive integer of length 1,
giving the number of positions to lead or lag by. Default uses 1</dd>
<dt>fill</dt>
<dd>Value to use for padding when the window goes beyond the input length.
Default uses <code>NA</code></dd></dl>

Arguments

Fast lead/lag for vectors — lead_dt

<dl>

<dt>x</dt>
<dd>A vector</dd>


<dt>n</dt>
<dd>a positive integer of length 1,
giving the number of positions to lead or lag by. Default uses 1</dd>


<dt>fill</dt>
<dd>Value to use for padding when the window goes beyond the input length.
Default uses <code>NA</code></dd>

</dl>

lead_dt: Fast lead/lag for vectors

Description

Usage

Value

Arguments

See Also

Examples