Matrices in Latex
amsmath is an extension package that provides various features for writing math formulas.
Example (one Dimensional)
\documentclass[12pt]{article} \usepackage{amsmath} % including amsmath package \begin{document} $$ \frac{1}{2} \begin{bmatrix} -1 & 8 & 0 & -8 & 1 \\ \end{bmatrix} $$ \end{document}
Output
Example (Two Dimensional)
\documentclass[12pt]{article} \usepackage{amsmath} % including amsmath package \begin{document} $$ \begin{bmatrix} 1/256 & 1/64 & 22 & 1/64 & 1/256 \\ 1/64 & 1/16 & 3/32 & 3 & 1/64 \\ 21 & 33 & 9/64 & 2 & 3/128 \\ 1/64 & 1/16 & 3/32 & 1/16 & 1/64 \\ 1/256 & 1/64 & 18 & 1/64 & 56 \end{bmatrix} $$ \end{document}
Output
Example (Matrix Multiplication)
\documentclass[12pt]{article} \usepackage{amsmath} % including amsmath package \begin{document} $$ \begin{bmatrix} \sum{wI_x}^2 \hspace{6 mm} \vspace{2mm} \sum{wI_x I_y}^2 \\ \sum{wI_x I_y} \hspace{5 mm} \vspace{2mm} \sum{wI_y}^2 \end{bmatrix} \begin{bmatrix} \vspace{4mm} a \\ b \end{bmatrix} = -\begin{bmatrix} \vspace{4mm} \sum{wI_x I_y}^2 \\ \sum{wI_x I_y}^2 \end{bmatrix} $$ \end{document}
Output