equationsmath-mode
I am trying to add a green box around the first two terms in my equation (beta_0 and b_i). I also want to add a circle around the second term (b_i). Is it possible to do this in LaTeX? My code is below which produces the equation. Any help would be great.
\begin{equation}
\mathbf{Y_{ij}} = \beta_{0} +\mathbf{ b_i} + \beta_1x_1 + \ldots + \beta_nx_n + \mathbf{\epsilon_{ij}}
\end{equation}
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.)
I suggest you make the following changes to your code
To typeset curly braces in TeX/LaTeX, it's necessary to enter them as \{ and \} rather than as { and }. I've replaced your { and } terms with curly braces below since you feature them in your example. However, they're not really needed and could thus be omitted entirely.
Since the curly braces and square brackets will enclose material that's broken across two lines, one can't use \left and \right to make them "large". I suggest you use the explicit sizing instructions \biggl and \biggr.
Don't write cos and sin but \cos and \sin to have TeX typeset the materials in an upright roman font rather than in math italics.
\documentclass{article}
\usepackage{amsmath} % provides the "align*" environment
\begin{document}
\begin{align*}
\vec{B}^{tra}(\textbf{r})
= \sum^{+\infty}_{n=-\infty}\biggl\{ j^{-n+1}
&\biggl[ \frac{k_{+2}c_{n}}{\omega}
\bigl(\textbf{M}^{1}_{n}(k_{+2}r) +\textbf{N}^{1}_{n}(k_{+2}r)\bigr) \cos(\theta) \\
&\quad {}-\frac{k_{-2}d_{n}}{\omega}
\bigl(\textbf{M}^{1}_{n}(k_{-2}r)-\textbf{N}^{1}_{n}(k_{-2}r)\bigr) \sin(\theta)
\biggr]\biggr\}.
\end{align*}
\end{document}
Without the unnecessary curly braces and with the superscript term "tra" typeset in an upright-roman font, the equation looks like this:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
\vec{B}^{\textup{tra}}(\textbf{r})
= \sum^{+\infty}_{n=-\infty} j^{-n+1}
&\biggl[ \frac{k_{+2}c_{n}}{\omega}
\bigl(\textbf{M}^{1}_{n}(k_{+2}r) +\textbf{N}^{1}_{n}(k_{+2}r)\bigr) \cos(\theta) \\
&\quad {}-\frac{k_{-2}d_{n}}{\omega}
\bigl(\textbf{M}^{1}_{n}(k_{-2}r)-\textbf{N}^{1}_{n}(k_{-2}r)\bigr) \sin(\theta) \biggr].
\end{align*}
\end{document}
Best Answer
For complex drawings (circles, etc), you might need to go the
tikzroad.But for simple shading of elements, a regular
\colorboxshould do, i.e.which yields
In case you want to do more than just highlight terms but are looking to explain the terms, I once wrote the following code for my master's thesis presentation:
which this time yields:
You can even easily extend that code to fade the color from slide to slide and highlight one term at a time if you're using
beamer(just add a\temporal<+>before the\stackrel, duplicate the\stackrelcode three times and change the colors in each variant).