[texhax] fbox in align environment

Sebastian Canagaratna s-canagaratna at onu.edu
Wed Jun 17 18:20:15 CEST 2009


Phil:

   I have solved the problem. My mailer seems to have introduced the
characters 3D in lots of places. I removed them and the code works.

   It works like a charm. It works under pdflatex as well. I tried
alignedboxsep as 10 pt, and it works fine.

   Thanks very much.

   Sebastian

On Wed, Jun 17, 2009 at 04:13:59PM +0200, Philip G. Ratcliffe wrote:
> Here's a more self-contained version, which should handling alignmnet better
> and allows for changing of \fboxsep via \alignboxedsep:
> 
> \documentclass{article}
> \usepackage{amsmath}
> \def\alignboxed#1&#2\endalignboxed{%
>   \bgroup
>   \fboxsep=\alignboxedsep
>   \rlap{\boxed{#1#2}}\hphantom{#1\kern\fboxsep}
>   \egroup
> }
> \newlength{\alignboxedsep}
> \alignboxedsep=1pt
> \begin{document}
> \begin{align}
>   f_1(x) &= a+bx,
> \\
>   \alignboxed
>   f_2(x) &= a+bx+cx²,
>   \endalignboxed
> \\
>   \alignboxed
>   f_3(x) &= a+bx+cx²+dx³.
>   \endalignboxed
> \end{align}
> \begin{align*}
>   x+y+2    & = 1
> \\
>   2x+3y-4z & = 2
> \\
>   \alignboxed
>   3x-2y+z  & =3
>   \endalignboxed
> \\
>   \alignboxed
>   a & = b+c+d
>   \endalignboxed
> \end{align*}
> \end{document}
> 
> Cheers,  Phil
> 


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