Math & Science ⇒ Strikethrough a Column or Row in a Matrix

[thanatoz]

Hello, I'm writing a text explaining the minors method on matrices, my code for matrices is something like this:

Code: Select all

\begin{empheq}{align*}
\left|\begin{array}{ccc} 3&-2&1\\ -2&-4&-1\\ 2&-1&5 \end{array}\right|
\end{empheq}

I want to get this:


But I can't find any way to do it. Any help would be appreciated.

[localghost]

A Forum Search at least yields one possible solution [1]. For details see the pgf/tikZ user guide.

[1] View topic: Striking out rows and columns


Best regards and welcome to the board
Thorsten