4

I have several problems with using eqnarray and minipage at the same time. When I'm using only eqnarray, I have good numbered equations but can't add footnotes to them (with minipage I can add footnotes, but equations not numbered). What should I do, maby switch some packages?

\begin{eqnarray}
\begin{minipage}{\textwidth}
\begin{split}
P_L_S(f)=\frac{1}{2\sigma^2}\*\Bigg\{\frac{[\sum_{k=1}^N\*(x_k-\bar{x})\cos(2\pi{f}(t_k-\tau))]^2}{\sum_{k=1}^N\*\cos^2(2\pi{f}(t_k-\tau))}\\+\frac{[\sum_{k=1}^N\*(x_k-\bar{x})\sin(2\pi{f}(t_k-\tau))]^2}{\sum_{k=1}^N\*\sin^2(2\pi{f}(t_k-\tau))}\Bigg\}\footnote[2]{To see more about Matlab Plomb equations and described in Equation 4.1 variables, \newline visit Matlab Plomb Documentation www.mathworks.com/help/signal/ref/plomb.html} 
\end{split}
\end{minipage}
\end{eqnarray}

enter image description here

Mico
  • 506,678
AlexSok
  • 91

1 Answers1

4

Some comments and suggestions:

  • I can see no justification or excuse whatsoever for using an eqnarray environment here.

  • Place the equation inside the minipage.

  • Use an {aligned}[b] environment to split the material across two rows.

  • Place the \footnote directive immediately after \end{aligned} and before \end{equation}.

  • Optional: Insert horizontal rules (via \hrule) above and below the minipage in order to create some visual separation from the surrounding material.

enter image description here

\documentclass{article}
\usepackage{amsmath,xurl,lipsum}
\urlstyle{same}
\begin{document}
\lipsum[1] % filler text

\bigskip\noindent
\begin{minipage}{\textwidth}
\hrule % <-- insert a horizontal rule (optional)
\begin{equation}
\begin{aligned}[b]
P_{L_{S(f)}}=\frac{1}{2\sigma^2} 
&\Biggl{ \frac{\bigl[\sum_{k=1}^N (x_k-\bar{x})\cos(2\pi{f}(t_k-\tau))\bigr]^2}{%
                      \sum_{k=1}^N \cos^2(2\pi{f}(t_k-\tau))}\
&\quad   +\frac{\bigl[\sum_{k=1}^N (x_k-\bar{x})\sin(2\pi{f}(t_k-\tau))\bigr]^2}{%
                      \sum_{k=1}^N*\sin^2(2\pi{f}(t_k-\tau))}
 \Biggr}
\end{aligned}\raisebox{1\baselineskip}{\footnote{To see more about Matlab Plomb equations and described in Equation 4.1 variables, visit Matlab Plomb Documentation \url{www.mathworks.com/help/signal/ref/plomb.html}.}}
\end{equation}
\end{minipage}
\hrule\bigskip % <-- another horizontal rule (optional)
\lipsum[2] % more filler text
\end{document}
Mico
  • 506,678