[Tex/LaTex] Positioning of image within an equation

equationsgraphicspositioning

I have the following problem: I would like to have images of Feynman diagrams as part of equations. Using

\newcommand{\imineq}[2]{
\includegraphics[height=#2ex]{#1}}

I had success in as far as

\begin{equation}
H\left(\imineq{Feynman_image}{7}\right)=
\end{equation}

does put the image roughly where it's meant to be but shifted upwards to the top half of the brackets. Anyone have any ideas as to how I can get the image to appear vertically centered and ideally get the brackets to scale properly?

Best Answer

In math mode there is the command \vcenter which will center material vertically. So you can set up your command as follows:

\documentclass{article}

\usepackage{mwe}

\newcommand{\imineq}[2]{\vcenter{\hbox{\includegraphics[height=#2ex]{#1}}}}

\begin{document}

\( a \left( \imineq{example-image-a}{4} \right) b \)

\end{document}

Sample output

Related Solutions

[Tex/LaTex] Scale included graphics to the higher ratio instead of the lower for given width, height

The newest version of adjustbox from 2011/08/07 provides min width, min height, min size and also max ... as well. These keys ensure that the given dimension is at least or at most the given length and scale it up or down if required, respectively. They always keep the aspect ratio. I think the min size={<width>}{<height>} is what you need. It uses the larger scaling factor, as you requested. If you have an image which is already larger you need to use max size beforehand with a smaller size first to ensure it is scaled down. This doesn't has any effect on the final image resolution because the whole image is included in the PDF unchanged and then shown scaled by the PDF viewer. Each scaling only adds a little rounding error if the resulting factor isn't an integer.

When loaded with the export option adjustbox exports these key also to \includegraphics. It also provides a Clip and Clip* keys (note the capital C) to clip the content after any scaling etc. You can use \width and \height to refer to the current size. Clip* awaits the clip viewport, so use .5\width-.5\yourlength, .5\width+.5\yourlength, etc. to clip from the center:

\documentclass{standalone}

\usepackage[export]{adjustbox}

\begin{document}

\includegraphics{image}

\includegraphics[width=10cm,height=10cm,keepaspectratio]{image}

\includegraphics[min size={10cm}{10cm}]{image}

\includegraphics[min size={10cm}{10cm},Clip*={.5\width-5cm} {.5\height-5cm} {.5\width+5cm} {.5\height+5cm}]{image}

\end{document}

enter image description here

[Tex/LaTex] Horizontal alignment within an equation using Tikz

I have to say that I didn't get the real issue probably but I think instead of over-automating, you can simplify a little bit by selecting a text width (and height if you like) and adjust it afterwards.

\documentclass[10pt]{article}
\usepackage{tikz,amsmath,amssymb}
\tikzset{mynode/.style={anchor=base,inner sep=0pt,outer sep=0pt,text width=1.5cm,align=center}} % If you wish add: minimum height=2em
\newcommand{\putintonode}[2]{\tikz[baseline]{\node[#1]{#2};}}
\begin{document}
\begin{alignat*}{3}
A  &= \putintonode{mynode}{$\dfrac{\partial u}{\partial x} + \lambda$} &&+ \dfrac{\partial f}{\partial y}\dfrac{\partial f}{\partial z} \\
B  &= \putintonode{fill=blue!20,mynode}{$\dfrac{\partial u}{\partial z} + \dfrac{\partial^2 u}{\partial x}$} &&+ \gamma  \\
CD &= \putintonode{fill=green!20,mynode}{$\dfrac{\partial f}{\partial x}$} && + \dfrac{\partial f}{\partial z} \\
E  &= \putintonode{mynode}{$\Gamma(x)$} &&+ \Xi(y)
\end{alignat*}
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Scale included graphics to the higher ratio instead of the lower for given width, height

[Tex/LaTex] Horizontal alignment within an equation using Tikz

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