I already know how to do horizontal lines. It seems like the keyboard is supposed to have a symbol for vertical lines which I don't see. Any suggestions?

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- Jan 20th 2011, 11:46 AMwonderboy1953Vertical lines
I already know how to do horizontal lines. It seems like the keyboard is supposed to have a symbol for vertical lines which I don't see. Any suggestions?

- Jan 20th 2011, 11:51 AMAckbeet
Usually it's the key right above the Enter key. Hold down shift + that key. You should get "|" as a result.

- Jan 20th 2011, 11:57 AMwonderboy1953
Nice. The key shows it as a broken line (darn library), but it works.

- Jan 24th 2011, 02:07 PMemakarov
Since this is a LaTeX forum, I thought I'd share this. I read recently that there are three ways to type a vertical bar in LaTeX: | (synonym: \vert), \lvert and \rvert, and \mid. The first produces an ordinary math symbol like letters and digits (class \mathord); the second makes opening and closing delimiters (\mathopen and \mathclose), and the third produces a binary relation (\mathrel). Each class is inserts its own spaces. For example, there is a thin space \, between an ordinary symbol and an operator, but no space between an opening delimiter and an operator: compare $\displaystyle |\sin x|$ and $\displaystyle \lvert\sin x\rvert$. The relation \mid is good for set notation $\displaystyle \{x\in\mathbb{N}\mid x<5\}$ and to denote divisibility.

- Jan 24th 2011, 02:36 PMPlato
Here are more ways to do this.

[tex] \left|\sin(x)\right| [/tex] gives $\displaystyle \left| \sin(x)\right| $

[tex] \left\|\sin(x)\right\| [/tex] gives $\displaystyle \left\| \sin(x)\right\| $