Align text by numbers in table columns

Question

I need to align the text in columns by decimals in the numbers. However the numbers go together with text so I can not simple use dcolumn package in 5th column as in the 1st one. If I split to more columns - the spaces are too big.

And I can not use siunitx since I have to use Slunits and they just don't work together.

The code:

\documentclass[12pt]{article}

\usepackage{multirow}
\usepackage{array}
\newcommand{\sta}{\mathrm{(stat.)}}
\newcommand{\sys}{\mathrm{(sys.)}}

\usepackage{dcolumn}
\newcolumntype{d}[1]{D{.}{.}{#1} }

\begin{document}
    \begin{table}
        \begin{center}
            \begin{tabular}{|d{1.3}cd{1.3}| d{3.4} l | l l |}%{|lcl|ll|ll|}
                \hline
                \multicolumn{3}{|c|}{\strut$x$ range}    
                & \multicolumn{2}{c|}{  measurement 1 (units)} 
                & \multicolumn{2}{c|}{  measurement 2 (units)} \\
                \hline
                0.000 &--& 0.005   &   452.4444 & $  \pm$   43.4444$\sta\,\pm$  23.4444$\,\sys$ &     87.4444     & $  \pm$    7.4444$\,\sta$ \\
                0.025 &--& 0.010   &   645.4444 & $  \pm$   45.4444$\sta\,\pm$  42.4444$\,\sys$ &    410.4444     & $  \pm$   40.4444$\,\sta$ \\
                0.010 &--& 0.015   &   458.4444 & $  \pm$   45.4444$\sta\,\pm$  36.4444$\,\sys$ &     79.4444     & $  \pm$    4.4444$\,\sta$ \\
                0.025 &--& 0.025   &   167.4444 & $  \pm$   18.4444$\sta\,\pm$  14.1747$\,\sys$ &     46.4444     & $  \pm$    4.4444$\,\sta$ \\
                0.045 &--& 0.030   &    52.4444 & $  \pm$    4.4444$\sta\,\pm$   4.4444$\,\sys$ &     18.7175     & $  \pm$    4.4444$\,\sta$ \\
                0.040 &--& 0.090   &     4.4444 & $  \pm$    4.4444$\sta\,\pm$   4.4444$\,\sys$ &      4.4444     & $  \pm$    4.4444$\,\sta$ \\
                \hline
            \end{tabular}
        \end{center}
        \caption{text.}
    \end{table}
\end{document}

Answer 1

I would recommend that you provide more information in the argument of tabular about the structure of the table. That way, the body of the tabular environment need contain only numbers.

\documentclass[12pt]{article}

\usepackage{dcolumn}
\newcolumntype{d}[1]{D{.}{.}{#1} }

\begin{document}

\begin{table}
\centering
\begin{tabular}{|d{1.3} @{--} d{1.3} | 
                 d{3.4} @{${}\pm{}$} 
                 d{2.4} @{(stat.)${}\pm{}$} 
                 d{2.4} @{(sys.)\hspace{\tabcolsep}} |
                 d{3.4} @{${}\pm{}$} 
                 d{2.4} @{(stat.)\hspace{\tabcolsep}} |}
\hline
  \multicolumn{2}{|c|}{\strut$x$ range}
& \multicolumn{3}{ c|}{measurement 1 (units)} 
& \multicolumn{2}{ c|}{measurement 2 (units)} \\
\hline
0.000 & 0.005 & 452.4444 & 43.4444 & 23.4444 & 87.4444 & 7.4444 \\
0.025 & 0.010 & 645.4444 & 45.4444 & 42.4444 &410.4444 & 40.4444 \\
0.010 & 0.015 & 458.4444 & 45.4444 & 36.4444 & 79.4444 & 4.4444 \\
0.025 & 0.025 & 167.4444 & 18.4444 & 14.1747 & 46.4444 &  4.4444 \\
0.045 & 0.030 &  52.4444 &  4.4444 &  4.4444 & 18.7175 & 4.4444 \\
0.040 & 0.090 &   4.4444 &  4.4444 &  4.4444 &  4.4444 & 4.4444 \\
\hline
\end{tabular}
\caption{text.}
\end{table}
\end{document}