[#bsl-vector-027-at-00]
= xref:bsl.adoc[bsl]::xref:bsl/vector-027.adoc[vector&lt;MetricSampleGroup&gt;]::at
:relfileprefix: ../../
:mrdocs:

Return a reference providing modifiable access to the element at the specified `position` in this vector&period; Throw a `std&colon;&colon;out&lowbar;of&lowbar;range` exception if `position &gt;&equals; size()`&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;vector&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/vectorBase-06a.adoc[reference]
at(xref:bsl/vectorBase-06a/size_type.adoc[size&lowbar;type] position);
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#
