2

My MWE:

\documentclass{report}
\usepackage{amsmath}

\begin{document}

The partial derivatives are given by:
\begin{subequations}
\begin{align}
\frac{\partial \beta_{2,1}}{\partial x_1} &= \gamma_2x_2 \cos(x_1), &&\frac{\partial \beta_{2,1}}{\partial x_2} = \gamma_2 \sin(x_1), &&&\frac{\partial \beta_{2,1}}{\partial u} = 0\\
\frac{\partial \beta_{2,2}}{\partial x_1} &= 0, &&\frac{\partial \beta_{2,2}}{\partial x_2} = \gamma_2 x_2, &&&\frac{\partial \beta_{2,2}}{\partial u} = 0\\
\frac{\partial \beta_{2,3}}{\partial x_1} &= 0, &&\frac{\partial \beta_{2,3}}{\partial x_2} = \gamma_2 u, &&&\frac{\partial \beta_{2,3}}{\partial u} = \gamma_2x_2
\end{align}
\end{subequations}

\end{document}

The result: enter image description here

However, I would like to obtain the following result: enter image description here

4

To have fuller control on the spacing of equations, you can use the alignat environment. In addition, to simplify typing partial derivatives (fist order only), I introduce a macro, \pder with one argument — actually two, separated by a comma, based on the esdiff package and on xparse. Here is an example, where the groups of equations are separated by 0.8em:

\documentclass{report}
\usepackage{amsmath}
\usepackage{esdiff}
\usepackage{xparse}

\NewDocumentCommand\pder{>{\SplitArgument{1}{,}}m}{\pderaux#1}
\NewDocumentCommand\pderaux{m m}{\diffp{{#1}}{{#2}}}

\begin{document}

The partial derivatives are given by:

\begin{subequations}
\begin{alignat}{5}
\pder{\beta_{2,1}, x_1} & = \gamma_2x_2 \cos(x_1), &\hspace{0.8em}   \pder{\beta_{2,1}, x_2} & = \gamma_2 \sin(x_1), &\hspace{0.8em}    \pder{\beta_{2,1}, u} &= 0\\
\pder{\beta_{2,2}, x_1} & = 0,& \pder{\beta_{2,2}, x_2}&= \gamma_2 x_2,&  \pder{\beta_{2,2}, u} &= 0 \\
\pder{\beta_{2,3}, x_1} & = 0, & \pder{\beta_{2,3}, x_2} & = \gamma_2 u, &  \pder{\beta_{2,3}, u} &  = \gamma_2x_2
\end{alignat}
\end{subequations}

\end{document} 

enter image description here

5

Tell LaTeX more accurately what spacing you want, by inserting more ampersands.

enter image description here

Please note that putting the ampersand after the equals sign (=&) will produce less spacing between the equals sign and the character that follows. Putting the ampersand before (i.e. &=) will produce slightly prettier spacing.

\documentclass{report}
\usepackage{amsmath}

\begin{document}

The partial derivatives are given by:
\begin{subequations}
\begin{align}
\frac{\partial \beta_{2,1}}{\partial x_1} &= \gamma_2x_2 \cos(x_1),     &\frac{\partial \beta_{2,1}}{\partial x_2} &= \gamma_2 \sin(x_1),   &\frac{\partial \beta_{2,1}}{\partial u} &= 0\\
\frac{\partial \beta_{2,2}}{\partial x_1} &= 0,                 &\frac{\partial \beta_{2,2}}{\partial x_2} &= \gamma_2 x_2,     &\frac{\partial \beta_{2,2}}{\partial u} &= 0\\
\frac{\partial \beta_{2,3}}{\partial x_1} &= 0,                 &\frac{\partial \beta_{2,3}}{\partial x_2} &= \gamma_2 u,       &\frac{\partial \beta_{2,3}}{\partial u} &= \gamma_2x_2 
\end{align}
\end{subequations}

\end{document}

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.