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About manipulation the text

  1. May 21, 2012 #1
    Hi:
    I am a newbie to this forum, and I don't know how to
    use the text editor correctly. If I hope to write an 3x3 matrices,
    how to key in it correctly in this thread.
    and furthermore, if there any manual about the editor, thanks a lot.
     
  2. jcsd
  3. May 21, 2012 #2

    Borek

    User Avatar

    Staff: Mentor

  4. May 21, 2012 #3
    I have tried a example as following, but still not work:
    \begin{matrix}
    1 & 1 & -1\\
    1 & -1 & 1\\
    1 & 1 & 1
    \end{matrix}

    is there any other method, thanks
     
  5. May 21, 2012 #4
    That looks pretty good! If you want round parentheses around your matrix use pmatrix:
    $$
    \begin{pmatrix}
    1 & 1 & -1\\
    1 & -1 & 1\\
    1 & 1 & 1
    \end{pmatrix}
    $$
    and for square brackets use bmatrix:
    $$
    \begin{bmatrix}
    1 & 1 & -1\\
    1 & -1 & 1\\
    1 & 1 & 1
    \end{bmatrix}
    $$.

    Also, surround your LaTeX with either ## or $$ (click 'Quote' to check out my example).
     
  6. May 21, 2012 #5
    thanks
     
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