Text Formatting ⇒ Equation Formatting Problem

[buttnana]

Hi,

I have a few questions regarding the format of equations, I have the following code.

Code: Select all

\begin{equation}
\center
$y_i_t$ = $\alpha_i$ + $\gamma_t$ + $X_i_t\beta$ + $\displaystyle\sum_h\sum_k\delta_k^hA_{kit}^h + \varepsilon_{it}$
\label{eq}
\end{equation}

and the output gives me something like the attached picture. I am wondering why there is such a big gap between the text and the equation, and how can I center only the equation while keeping the numbering flushed to the right?

Thank you!

[torbjorn t.]

I'm surprised you got any output at all. The \center command isn't really defined, as far as I know, though there is a center environment. But you don't need that, as stuff within equation is centered anyway, unless you specify otherwise. Further, as equation is a displayed math environment, there is no need to use inline math ($...$) or \displaystyle within it -- everything in the environment is displayed math. Lastly, you need extra braces for x_i_t, I got an error message, so write x_{i_t} (Edit: On second thought, glancing at your picture, I guess you're really after x_{it}.).

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\usepackage{lipsum}
\begin{document}
\lipsum[1]
\begin{equation}\label{eq}
y_{i_t} = \alpha_i + \gamma_t + X_{i_t}\beta \sum_h\sum_k\delta_k^hA_{kit}^h + \varepsilon_{it}
\end{equation}
\end{document}

2011-11-22_08-17-19.png (16.81 KiB) Viewed 2420 times

[buttnana]

Ah, thank you. The math environment works like a charm!.