# [texhax] Problem with eqnarray

Modhurita Mitra mmitra at astro.uiuc.edu
Fri Apr 8 10:48:40 CEST 2005

Hi,
I made the changes you and Morten suggested, so now my expression
looks
like

\begin{eqnarray}
f(x,y,z) & = & P \times \\
\exp \bigl[ -\bigl( \frac{ \cos \theta \cos \phi (x - \mu_x) \\
+ \sin \theta (y - \mu_y) \\
- \cos \theta \sin \phi (z - \mu_z)}{A_x} \bigr)^2 \\
-\bigl(\frac{ \sin \theta \cos \phi (x - \mu_x) \\
+ \cos \theta (y - \mu_y) \\
+ \sin \theta \sin \phi (z - \mu_z)}{A_y} \bigr)^2 \\
-\bigl( \frac{\sin \phi (x - \mu_x) + \cos \phi (z - \mu_z)}{A_z}
\bigr)^2 \bigr]
\end{eqnarray}

However, I still get the errors:

! Missing } inserted.
<inserted text>
}
l.270 ...- \cos \theta \sin \phi (z - \mu_z)}{A_x}
\bigr)^2 \\
?
! Extra }, or forgotten \endgroup.
<inserted text> }

l.270 ...- \cos \theta \sin \phi (z - \mu_z)}{A_x}
\bigr)^2 \\
?
! Missing } inserted.
<inserted text>
}
l.270 ...- \cos \theta \sin \phi (z - \mu_z)}{A_x}
\bigr)^2 \\
?

Could it be that there is some unbalances { somewhere earlier in the text?

Yes, I do tend to press on even when I see an error since then I can see
many errors at once and don't have to compile the file several times.

I am kind of a novice at LaTeX, so I am not sure about the package you
mention. There was \usepackage{natbib} at the beginning of the template
file I am using. And I am using AASTeX, which is called the style file, I
think, for astrophysical journals.

Thanks,
Sincerely,
M.

On Fri, 8 Apr 2005, Robin Fairbairns wrote:

>>  	I am having trouble compiling my file which contains an eqnarray.
>> At the third line in the following expression (the one beginning with
>> - \cos, I get an error.
>
> in that case, you're not compiling what we see here, or you've some
> highly eccentric package you don't bother to mention:
>
>> \begin{eqnarray}
>>   f(x,y,z) & = & P \times \\
>>   \exp \left $-\left( \frac{ \cos \theta \cos \phi (x - \mu_x) \\ > > \[ opens displaymath mode, so \left\[ produces the error > > ! Missing delimiter (. inserted). > > and then (if you're crazy enough to press on) > > ! LaTeX Error: Bad math environment delimiter. > >> + \sin \theta (y - \mu_y) \\ >> - \cos \theta \sin \phi (z - \mu_z)}{A_x} \right)^2 \\ > > i suggest you clear up that error (there's a$ later on to clear up,
> too).  if that lot then works, perhaps you might consider using one of
> the amsmath align environments in place of the seriously grotty
> eqnarray
>
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