[Tex/LaTex] Need help to adjust horizontal spaces in a table


I am making a table but i am not able to adjust it. Here is a screen shot.enter image description here
i have used following tex code



\begin{tabular}{c c c c c c c}


Methods &computing time & iterative times & $\|A X_k A - A\|_2$ & $\|X_k A X_k - X_k\|_2$  & $\|(A X_k)^* - A X_k\|_2$ & $\|(A X_k)^* - A X_k\|_2$ \\ [0.5ex]


method() & &  &  &  &  & \\
proposed method &  &  &  &  &  &  \\



Could anybody help me. I would be very much thankful to you.

Best Answer

You have quite a few columns in your table, and each column header is quite wide. To make the table fit in the textblock, I suspect you'll need to

  • reduce the font size used in the table slightly,
  • reduce the amount of inter-column whitespace, and
  • reduce the widths of columns 2 and 3 by splitting their headers over two consecutive lines.

Separately, I'd also recommend you use the commands \toprule, \midrule, and \bottomrule provided by the booktabs package and that you create a command named, say, \norm, to denote the L_2 norm expressions. By creating such a command, you'll have a much easier time in the future if you ever decide to change the appearance of the \norm function.

Finally, you didn't specify which font size, paper width, and margin widths you employ, so I've had to make some assumptions about these important parameters in the MWE below. The MWE starts with a horizontal line that spans the width of the text block to give you an idea of the value of this important parameter.

enter image description here

\usepackage[margin=1in]{geometry} % assume 1" margins
\noindent Width of text block:

\small % reduce font size by about 10%
\caption{My table}
\setlength\tabcolsep{2.5pt} % default value: 5pt
\begin{tabular}{@{}l *{6}{c} @{}} % remove blank spaces at ends of table
Methods &
computing  & 
iterative & 
$\norm{A X_k A - A}_2$ & 
$\norm{X_k A X_k - X_k}_2$  & 
$\norm{(A X_k)^* - A X_k}_2$ & 
$\norm{(A X_k)^* - A X_k}_2$ \\ 
& time & times\\ 
method() & &  &  &  &  & \\
proposed method &  &  &  &  &  &  \\