[Tex/LaTex] How to center equations

equations

My code is:

onde
\begin{equation}
\pi(\textbf{x})=\frac{1}{1+e^{-(\beta_0+\sum_{i=1}^{p}\beta_ix_i)}}
\end{equation}

How can I put the equation in the middle?

Best Answer

I can more or less reproduce your screenshot with the following code (observe that the amsmath package is loaded with the option fleqn):

\documentclass{book}
\usepackage[a4paper,margin=2.5cm]{geometry}
\usepackage[fleqn]{amsmath}
\begin{document}
\setcounter{chapter}{2}
\setcounter{equation}{1}

\noindent
onde,
\begin{equation}
\pi(\textbf{x})=\frac{1}{1+e^{-(\beta_0+\sum_{i=1}^{p}\beta_ix_i)}}
\end{equation}
\end{document}

If you want to have the displayed equations centered rather than left-justified, don't specify the fleqn option while loading amsmath.

Separately, you should use \mathbf rather than \textbf in math mode. Also, do consider using \exp[...] notation instead of e^{...}; your readers will thank you.

\documentclass{book}
\usepackage[a4paper,margin=2.5cm]{geometry}
\usepackage{amsmath}
\begin{document}
\setcounter{chapter}{2}
\setcounter{equation}{1}

\noindent
onde,
\begin{equation}
\pi(\mathbf{x})=\frac{1}{1+\exp[-(\beta_0+\sum_{i=1}^p \beta_ix_i)]}
\end{equation}
\end{document}

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[Tex/LaTex] aligning a multiline formula with the bullet of itemize

I would definitely go the second way with $\displaystyle: I find that it looks strange to have something centered after a bullet. To get the vertical alignment correct, just add [t] after \begin{aligned}, where "t" means "top". (See also the top of page 8 of the User's guide for the amsmath Package.)

Table of Contents – List of Equations Including Contents and Captions: A How-To Guide

Since you want a cheat sheet, I'd recommend the extract package. With a slightly different MWE:

\documentclass{article}
\usepackage[
  active,
  header=false,
  copydocumentclass=true,
  generate=\jobname-Cheatsheet,
  extract-env={equation},
  extract-cmdline={synopsis},
  ]{extract} % http://ctan.org/pkg/extract
\begin{extract*}
% Items executed in both the main and extracted document
% (extract manual, section 5.1)
\usepackage{amsmath}
\end{extract*}
\begin{extract}
% Items executed only in extracted document
\def\synopsis#1{#1}
\end{extract}
\def\synopsis#1{}
\begin{document}
First Euler observed that
\synopsis{Euler's equation tying together the five fundamental constants of mathematics}%
\begin{equation}
1 + e^{i \Pi} = 0.
\end{equation}

Then, Gauss discovered the normal distribution:
\synopsis{Normal distribution}%
\begin{equation}
P(x) = \frac{1}{{\sigma \sqrt {2\pi } }}e^{{{ - \left( {x - \mu } \right)^2 } \mathord{\left/ {\vphantom {{ - \left( {x - \mu } \right)^2 } {2\sigma ^2 }}} \right. \kern-\nulldelimiterspace} {2\sigma ^2 }}}
\end{equation}

Finally, Einstein proclaimed: 
\synopsis{Equivalence of mass and energy}%
\begin{equation}
E = m C^2
\end{equation}
\end{document}

you get an original document of:

enter image description here

and an extracted document of:

\documentclass{article}
% Items executed in both the main and extracted document
% (extract manual, section 5.1)
\usepackage{amsmath}
% Items executed only in extracted document
\def\synopsis#1{#1}

\begin{document}

\synopsis{Euler's equation tying together the five fundamental constants of mathematics}%

\begin{equation}
1 + e^{i \Pi} = 0.
\end{equation}

\synopsis{Normal distribution}%

\begin{equation}
P(x) = \frac{1}{{\sigma \sqrt {2\pi } }}e^{{{ - \left( {x - \mu } \right)^2 } \mathord{\left/ {\vphantom {{ - \left( {x - \mu } \right)^2 } {2\sigma ^2 }}} \right. \kern-\nulldelimiterspace} {2\sigma ^2 }}}
\end{equation}

\synopsis{Equivalence of mass and energy}%

\begin{equation}
E = m C^2
\end{equation}

\end{document}

and:

enter image description here

This also works with your original \caption command.

Best Answer

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[Tex/LaTex] aligning a multiline formula with the bullet of itemize

Table of Contents – List of Equations Including Contents and Captions: A How-To Guide

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