Take the 2-minute tour ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

I am writing a big formula where a vertical line is needed. Instead of $\vline$ or $|$, does anyone know a way to draw this vertical line of desired length? The formula is something like

$$
E\Bigg[
F_{m-1}\Big( \text{some big contents} \Big) |\: \mathcal{F}_1
\Bigg]
$$

Thank you very much!

share|improve this question
3  
For lots of examples and techniques for typesetting math, the mathmode documentation is very helpful. It should be part of your TeX distribution. –  Alan Munn Jan 2 '11 at 18:53
    
Thanks Alan Munn, I guess what you mean is this one: tex.ac.uk/tex-archive/info/math/voss/mathmode/Mathmode.pdf It is very helpful.:-) –  Anand Jan 2 '11 at 21:09
add comment

2 Answers

up vote 13 down vote accepted

Well, if you are manually defining the size, as in the example you could just put a \Bigg| at the right place. Probably better would be using \left, \middle and \right.

By the way: You should prefer \[ and \] instead of double $$.

\[ E\left[ F_{m-1}\Big( \text{some big contents} \Big) \middle|\: \mathcal{F}_1 \right] \]
share|improve this answer
    
Thank you very much! :-) –  Anand Jan 2 '11 at 20:45
add comment

Try enclosing your expression into \left. and \right\vert, as in

\left.\frac{\partial L}{\partial\bm{\beta}}\right\vert_{\hat\beta}=-2\bm{X'y}+2\bm{X'X\hat\beta}=0

which yields:

alt text

share|improve this answer
    
Thank you very much! :-) –  Anand Jan 2 '11 at 20:30
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.