# [Tugindia] Array environment

Arun Kejariwal arun_kejariwal at hotmail.com
Mon Oct 20 23:35:14 CEST 2003

Hi,
On compiling the following

$\begin{array}{ccc} 1 & \cellopts{\rowspan{2}} \int dx & 1 \\ 2 & 2 \\ 3 & 3 & 3 \\ \end{array}$

I get the following error

! Undefined control sequence.
l.148 1 & \cellopts
{\rowspan{2}} \int dx & 1 \\

Could someone please let me know what is going wrong here.

Actually I want a matrix like this

A     B
a   |   1     3  |
b   |   1     3  |
c   |   1     3  |

Not that each row and column has name. Can I produce the above using the
array environment??

Thanks,
Arun

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