Hi in a .Rd file, in a \deqn{} environment, how do I typeset a matrix in latex? I have \deqn{\left(\begin{bmatrix}a&b\\c&d\end{bmatrix}\right)}{omitted} but this doesn't give me the 2-by-2 matrix desired. Is there a manpage somewhere with a matrix that I could adapt? -- Robin Hankin Uncertainty Analyst National Oceanography Centre, Southampton European Way, Southampton SO14 3ZH, UK tel 023-8059-7743