Math & Science ⇒ MathType to LaTeX Issue

[aerodoc]

Mathtype converted a matrix to latex and this is what it gives me. When I used textworks, it gives me the following error. Any idea?

-------------------------------------------------------------------
! Misplaced alignment tab character &.
l.15 {{A}_{11}} &
{{A}_{12}} & {{A}_{16}} \\
?
Process interrupted by user

-------------------------------------------------------------------

Code: Select all

\documentclass{article}

\begin{document}

\[\left[ \begin{matrix}
   {{N}_{x}}  \\
   {{N}_{y}}  \\
   {{N}_{xy}}  \\
\end{matrix} \right]=\left[ \begin{matrix}
   {{A}_{11}} & {{A}_{12}} & {{A}_{16}}  \\
   {{A}_{12}} & {{A}_{22}} & {{A}_{26}}  \\
   {{A}_{16}} & {{A}_{26}} & {{A}_{66}}  \\
\end{matrix} \right]\left[ \begin{matrix}
   \varepsilon _{x}^{o}  \\
   \varepsilon _{y}^{o}  \\
   \gamma _{xy}^{o}  \\
\end{matrix} \right]\]


\end{document}[*]

[aerodoc]

Well, it looks like this works, as provided by the designer. Not sure what these lines are for, but it needed the 2nd and/or 3rd line.

---------------------------------------------------------------------

Code: Select all

\documentclass{article}
\usepackage{amssymb,amsmath}
\renewcommand{\rmdefault}{ptm}
\begin{document}

\[\left[ \begin{matrix}
{{N}_{x}} \\
{{N}_{y}} \\
{{N}_{xy}} \\
\end{matrix} \right]=\left[ \begin{matrix}
{{A}_{11}} & {{A}_{12}} & {{A}_{16}} \\
{{A}_{12}} & {{A}_{22}} & {{A}_{26}} \\
{{A}_{16}} & {{A}_{26}} & {{A}_{66}} \\
\end{matrix} \right]\left[ \begin{matrix}
\varepsilon _{x}^{o} \\
\varepsilon _{y}^{o} \\
\gamma _{xy}^{o} \\
\end{matrix} \right]\]

\end{document}

%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End:

[localghost]

[.] Not sure what these lines are for, but it needed the 2nd and/or 3rd line. […]

The amsmath package included in the second line provides the »matrix« environment, thus the generated code wouldn't work without the package. The third line switches to another font and is superfluous here.

There is the »bmatrix« which adds brackets automatically and this way shortens your code.

Code: Select all

\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{mathtools}   % loads »amsmath«

\begin{document}
  \[
    \begin{bmatrix}
      N_x \\
      N_y \\
      N_{xy} \\
    \end{bmatrix}
    =
    \begin{bmatrix}
      A_{11} & A_{12} & A_{16} \\
      A_{12} & A_{22} & A_{26} \\
      A_{16} & A_{26} & A_{66} \\
    \end{bmatrix}
    \begin{bmatrix}
      \varepsilon_x^o \\
      \varepsilon_y^o \\
      \gamma_{xy}^o \\
    \end{bmatrix}
  \]
\end{document}

Thorsten

[aerodoc]

Thanks! Now I just need to figure out this confusing font stuff, but thats another issue.