[Tex/LaTex] horizontal line/rule in column vector

Question

Trying to generate a column vector with a horizontal line/rule separating top half of the vector from the bottom half. Am starting from the following MWE:

\documentclass[11pt,letterpaper,oneside]{article}

\usepackage{amsmath}

\begin{document}

\begin{equation*}
\textbf{Y}=\begin{bmatrix}
 11\\
12\\
11\\
14\\
\rule{1.5em}{0.5pt}\\
8\\
11\\
12\\
10
\end{bmatrix}
\end{equation*}

\end{document} 

Works more or less, but I'm trying to tweak aesthetics by reducing the height above/below the rule. Functionally, this is analogous to trying to change the height of a single row n a matrix, which I don't think is doable.

I know I can move the rule up as desired using \raisebox

\raisebox{.5ex}{\rule{1.5em}{0.5pt}}\\

but that doesn't entirely satisfy.

Even possible? Basically, I'd like the space above/below the rule to be the same as the default spacing above/below each row.

Thanks…I can live with what I've got, but would like to tweak it, if possible.

Answer 1

Two possibilities, the idea of the second one can be used for general partitioned matrices where \cmidrule defined by booktabs doesn't mix with vertical rules in an array.

\documentclass[11pt,letterpaper,oneside]{article}

\usepackage{amsmath,booktabs}

\begin{document}

\begin{equation*}
\textbf{Y}=\begin{bmatrix}
  11\\
  12\\
  \cmidrule(lr){1-1}
  8\\
  10
\end{bmatrix}
=\left[\begin{array}{@{}c@{}}
  11\\
  12\\
  \hline
  8\\
  10
\end{array}\right]
\end{equation*}

\end{document}