html" class="external-link">dplyr::summarise()</a></code> function? (See the vignette
titled “Using summarise in matsbyname” for additional detail about this
ambiguity.) In the example below, the grouping has no effect on the
<code><a href="https://dplyr.tidyverse.org/reference/summarise.html" class="external-link">summarise()</a></code> function, because
<code>sum_byname(.summarise = FALSE)</code> assumes that each row of
<code>val</code> is an augend without an addend.</p>
<div class="sourceCode" id="