Matrices: Intro

$\LaTeX$ code for matrix examples 1 – 6 on the previous slide:

1. $\begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \end{bmatrix}$

2. $\begin{bmatrix} 😀 \\ 😁 \\ 😎 \\ 😜 \end{bmatrix}$

3. $\begin{bmatrix} \text{Six-Seven} \end{bmatrix}$

4. $\begin{bmatrix} a & b \\ c & d \\ e & f \\ g & h \\ i & j \end{bmatrix}$

5. $\begin{bmatrix} 65.7 & 62.4 & 73.8 & 76.6 & 75.0 \end{bmatrix}$

6. $\begin{bmatrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{bmatrix}$

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• $\LaTeX$ lets us create matrices using a matrix environment, e.g.

  $\begin{bmatrix} ... \end{bmatrix}$

  .
  • You must include the

    \usepackage{amsmath}

    package in your source code to be able to use this environment.
  • Various matrix environments / styles are displayed on the next slide.
• You will use

  &

  as separators between matrix elements on the same row, and

  \\

  to create another row of elements.