[Tex/LaTex] Align numbers on decimal point in tabular

horizontal alignmentspacingtables

I am trying to align numbers on decimal in tabular. I have found some information here:align to decimal point in the table. However, when I adopt that code into my table, it gives an error: 

! Package array Error: Illegal pream-token (S[table-format=-1.3, table-space-text-post=***]@{}): `c' used.

I do not understand why it creates the error above, can anybody help me?

Here is my latex code: 

  \begin{table*}[htb]
    \centering  
    \begin{tabular}{
    @{}|l|ccc|ccc|{S[table-format=-1.3,table-space-text-post=***]@{}}}
    \toprule
    \multirow{2}{*}{} & \multicolumn{3}{c|}{\textbf{2005}} & \multicolumn{3}{c|}{\textbf{2006}}  \\ \cmidrule(l){2-7} 
     & Q1 & Q2 & Q3 & Q1 & Q2 & Q3  \\ \midrule
    Price   & 0.99 & 5.45 & -0.13 & 0.11* & 0.77 & 5.11   \\ 
    Profit  &-0.01*** & -2.09 & 0.01 & -0.22** & 9.33 & -3.01   \\ 
    \bottomrule
    \end{tabular}
    \end{table*}

Best Answer

I looks like the fact that you've wrapped S[..] in braces throws the parser off. At least, removing the {} removes the error.

Note that vertical rules and booktabs don't go well together, so below I've removed the rules. I also used an S column for all the six last columns, that have numbers, and some other small changes.

enter image description here

\documentclass{article}
\usepackage{booktabs,siunitx}
\begin{document}
  \begin{table*}[htb]
    \centering  
    \begin{tabular}{@{}l *{6}{S[table-format=-1.2,table-space-text-post=***]}@{}}
    \toprule
    & \multicolumn{3}{c}{\textbf{2005}} & \multicolumn{3}{c}{\textbf{2006}}  \\ \cmidrule(lr){2-4}\cmidrule(lr){5-7}
     & {Q1} & {Q2} & {Q3} & {Q1} & {Q2} & {Q3}  \\ \midrule
    Price   & 0.99 & 5.45 & -0.13 & 0.11* & 0.77 & 5.11   \\ 
    Profit  &-0.01*** & -2.09 & 0.01 & -0.22** & 9.33 & -3.01   \\ 
    \bottomrule
    \end{tabular}
    \end{table*}
\end{document}
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