merge_append

A and B may be data.frame or data.table.<ul>
<li>If A is a data.table it will be modified by reference.</li>
<li>If A is a data.frame a modified data.frame is returned.</li>
</ul>

Implements rank preserving structural failure time model (RPSFTM), iterative parameter estimation (IPE), inverse probability of censoring weights (IPCW), marginal structural model (MSM), simple two-stage estimation (TSEsimp), and improved two-stage estimation with g-estimation (TSEgest) methods for treatment switching in randomized clinical trials.

Kaifeng Lu

trtswitch

Treatment Switching

merge_append function

<dl><dt>A</dt>
<dd>left table (data.frame or data.table) — rows preserved/order preserved</dd>
<dt>B</dt>
<dd>right table (data.frame or data.table) — must contain by_vars and new_vars</dd>
<dt>by_vars</dt>
<dd>character vector of join columns (e.g. c("id","tstart","tstop"))</dd>
<dt>new_vars</dt>
<dd>character vector of column names from B to append to A</dd>
<dt>overwrite</dt>
<dd>logical: if TRUE, overwrite any existing columns in A
with same avar names (default TRUE)</dd>
<dt>first_match</dt>
<dd>logical: if TRUE use first match when B has duplicate keys;
if FALSE, error on duplicates</dd></dl>

Arguments

Append columns from B to A by keyed join (fast, data.table-based) — merge_append

<dl>

<dt>A</dt>
<dd>left table (data.frame or data.table) — rows preserved/order preserved</dd>


<dt>B</dt>
<dd>right table (data.frame or data.table) — must contain by_vars and new_vars</dd>


<dt>by_vars</dt>
<dd>character vector of join columns (e.g. c("id","tstart","tstop"))</dd>


<dt>new_vars</dt>
<dd>character vector of column names from B to append to A</dd>


<dt>overwrite</dt>
<dd>logical: if TRUE, overwrite any existing columns in A
with same avar names (default TRUE)</dd>


<dt>first_match</dt>
<dd>logical: if TRUE use first match when B has duplicate keys;
if FALSE, error on duplicates</dd>

</dl>

merge_append: Append columns from B to A by keyed join (fast, data.table-based)

Description

Usage

Value

Arguments