Having the following siunitx table code in LyX, for each occurrence of \toprule and \midrule I obtain an error message:
The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g.,
\hobx'), typeI' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined.
I correctly imported siunitx in the preamble. TexLive version: 2012.10.20121205_r28449.fc18
LaTeX code:
\centering
\sisetup{output-decimal-marker={,}}
\begin{tabular}{ccS}
\toprule
{Dimensione finestra} & {Perdita} & {Tempo}\\
{} & {} & {(secondi)}\\
\midrule
10 & 0$\%$ & 121\\
\midrule
10 & 10$\%$ & 127\\
\midrule
10 & 20$\%$ & 176\\
\midrule
10 & 30$\%$ & 257\\
\midrule
10 & 40$\%$ & 442\\
\midrule
10 & 50$\%$ & 780\\
\midrule
10 & 60$\%$ & 1226\\
\midrule
10 & 70$\%$ & 1469\\
\midrule
10 & 80$\%$ & 1904 \\
\midrule
10 & 90$\%$ & 3234 \\
\midrule
50 & 0$\%$ & 46 \\
\midrule
50 & 10$\%$ &109 \\
\midrule
50 & 20$\%$ &146 \\
\midrule
50 & 30$\%$ &202 \\
\midrule
50 & 40$\%$ &257 \\
\midrule
50 & 50$\%$ &373 \\
\midrule
50 & 60$\%$ &544 \\
\midrule
50 & 70$\%$ &760 \\
\midrule
50 & 80$\%$ &1356 \\
\midrule
50 & 90$\%$ &6588 \\
\midrule
100 & 0$\%$ &76 \\
\midrule
100 & 10$\%$ &91 \\
\midrule
100 & 20$\%$ &109 \\
\midrule
100 & 30$\%$ &146 \\
\midrule
100 & 40$\%$ &180 \\
\midrule
100 & 50$\%$ &297 \\
\midrule
100 & 60$\%$ &414 \\
\midrule
100 & 70$\%$ &585 \\
\midrule
100 & 80$\%$ &1355 \\
\midrule
100 & 90$\%$ &4326 \\
\bottomrule
\end{tabular}