perl -e '$lc=0;while (<>) {$l=$_;chomp($l);$l=~s/^\s*//g;$l=~s/\s+/ /g;@ch=split(/ /,$l);if($lc++==0){print "\\begin{table}\n\\begin{tabular}{";foreach(@ch){print"l";}print"}\n";}$hc=0;foreach(@ch){if($hc++>0){print " & ";}print $_;}print " \\\\\n";}print "\\end{tabular}\n\\caption{\\label{tab:table-tag}Caption goes here!}\n\\end{table}\n";'  < DATAFILE

The datafile should contain one line of column headers, separated by spaces, followed by the data line by line, also separated by spaces:

Input:
col1      col2      col3      col4      col5      col6
0.0008    0.0144    0.4834    0.0980    0.1601    0.1403
278.3019  271.7593  272.2953  278.2213  272.6846  265.9941
0.1543    0.1533    0.5652    0.2473    0.3666    0.6602
0.1487    0.1368    0.5711    0.2391    0.3378    0.5920
0.1919    0.1798    0.5436    0.2686    0.3303    0.5166

Output:
\begin{table}
\begin{tabular}{llllll}
col1 & col2 & col3 & col4 & col5 & col6 \\
0.0008 & 0.0144 & 0.4834 & 0.0980 & 0.1601 & 0.1403 \\
278.3019 & 271.7593 & 272.2953 & 278.2213 & 272.6846 & 265.9941 \\
0.1543 & 0.1533 & 0.5652 & 0.2473 & 0.3666 & 0.6602 \\
0.1487 & 0.1368 & 0.5711 & 0.2391 & 0.3378 & 0.5920 \\
0.1919 & 0.1798 & 0.5436 & 0.2686 & 0.3303 & 0.5166 \\
\end{tabular}
\caption{\label{tab:table-tag}Caption goes here!}
\end{table}