Hi, These are two problems I've never seen when I used xtable() before... R 1.9.1 for Windows XP, xtable version 1.2-3: > final.df Loci Chr Marker Position P.values Deviance DF 1 Idd5 1 D1Mit181 42.6 0.0011 103.21 78 2 Idd6/19/20 6 D6Mit374 66.7 0.0014 104.29 78 3 Idd13 2 D2Mit490 64.5 0.0025 97.83 78 4 Idd8/12 13 D14Mit109 24 0.0244 102.41 78 5 Idd14 14 D13Mit39 3.3 0.0379 95.92 78 6 Idd3/10/17/18 3 D3Mit257 49.2 0.068 105.45 78 7 Idd9 4 D4Mit233 69.9 0.1406 107.13 78 8 Idd15 5 D5Mit338 43.7 0.2196 107.67 78 9 Idd7 7 D7Mit101 45.9 0.4608 95.96 78 10 Idd2 9 D9Mit328 17.5 0.5125 107.25 78 11 Aire 10 D10Mit198 33.9 0.6457 106.13 78 12 Idd4 11 D11Mit298 37.2 0.9261 107.47 78 13 Idd21 18 D18Mit135 9.8 0.9272 107.67 78 > xtable(final.df, + caption = "Summary for each Locus", + label = "tab:sumLocus") Error in x + ifelse(x == 0, 1, 0) : non-numeric argument to binary operator > is.data.frame(final.df) [1] TRUE final.df is a data frame, but I cannot understand what the error message means about "non-numeric argument to binary operator". The other problem is: > one.df Loci P.values 1 Idd5 0.1147 2 Idd13 0.0085 3 Idd14 0.002 4 Idd8.12 0.042 5 Idd7 0.0114 > xtable(one.df, + caption = "Fitting without Interactions", + label = "tab:noI") tab:noI % latex table generated in R 1.9.1 by xtable 1.2-3 package % Thu Sep 02 14:22:01 2004 \begin{table}[ht] \begin{center} \begin{tabular}{rll} \hline & Loci & P.values \\ \hline 1 & Idd5 & 0.1147 \\ 2 & Idd13 & 0.0085 \\ 3 & Idd14 & 0.002 \\ 4 & Idd8.12 & 0.042 \\ 5 & Idd7 & 0.0114 \\ \hline \end{tabular} \caption{Fitting without Interactions} \end{center} \end{table} > is.data.frame(one.df) [1] TRUE I want to give the resulting LaTeX markup for one.df a label, namely "tab:noI", but instead of putting a \label{tab:noI}, it just put "tab:noI" at the beginning of the output. I've tried to completely clear the workspace, delete the .RData and start fresh. But the problems still occur *_*. Any help would be appreciated! Kevin -------------------------------- Ko-Kang Kevin Wang PhD Student Centre for Mathematics and its Applications Building 27, Room 1004 Mathematical Sciences Institute (MSI) Australian National University Canberra, ACT 0200 Australia Homepage: http://wwwmaths.anu.edu.au/~wangk/ Ph (W): +61-2-6125-2431 Ph (H): +61-2-6125-7407 Ph (M): +61-40-451-8301