[texhax] Tex question - cases environment

[Angela Rademeyer]

Hi



Thanks for the help. When I run the version below I get this error:

[cid:image001.png at 01C99DC9.27537CE0]

Regards





Angela Rademeyer

OPSI SYSTEMS

082 498 9332

(011) 880 7951 ext. 225

www.opsisystems.com







-----Original Message-----
From: Axel E. Retif [mailto:axel.retif at mac.com]
Sent: 05 March 2009 08:29 AM
To: Angela Rademeyer
Cc: support at tug.org
Subject: Re: [texhax] Tex question - cases environment



On  4 Mar, 2009, at 14:01, Angela Rademeyer wrote:



> \begin{equation*}

> a_{ig} =

> \begin{cases}

> 1 & \text{if customer $i$ belongs to profile group $g$}\\

> 0 & \text{otherwise}\\[.3cm]

> \end{cases}

> \end{equation*}



First, in your preamble,



\usepackage{amsmath}



then,



\begin{flalign*}

a_{ig} =

\begin{cases}

1 & \text{if customer $i$ belongs to profile group $g$}\\

0 & \text{otherwise} \\[.3cm]

\end{cases} && %% <------------------ these two &&

\end{flalign*}



If you use TeXLive 2008 or a recent MiKTeX, I think you should have

Mathmode.pdf; in your terminal or command prompt,



texdoc mathmode



Best,



Axel


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