lyxspacingtables
When inserting a table in LyX, there's a space between the first and second rows, which I can get rid of by selecting the first row and turning off "bottom line", or selecting the second row and turning off "top line". However, if I try to do something similar to add space between the first and second columns of the table, removing the left line of the second column blanks out the line, and adding the left line to the first column adds in a second line.
Here's an example of what I've tried:
Here are my suggestions:
\setlength\tabcolsep{3pt} to cut the amount of intercolumn whitespace in half. (The default value of this parameter is 6pt.)\small (immediately after \begin{threeparttable}) with \footnotesize. (This also lets you get rid of the subsequent \footnotesize command.)Eliminate the vertical whitespace before the first column and after the final column by changing the tabularx setup as follows:
\begin{tabularx}{\textwidth}{@{}l*{10}{C}@{}}
(note the two new @{} elements).
With these changes, I manage to get the table to fit into the allocated textblock width. My papersize is US Letter; if yours is A4, you'll probably need to reduce the tabcolsep macro's value further, to 2pt.
Separately, since you're already loading the booktabs package, why don't you also replace the hideous \hline\hline commands with \toprule and \midrule, respectively. (This also lets you get rid of the \addlinespace instructions.)
Please note that the package times is obsolete. I suggest you load the package mathptmx instead -- unless you really want to mix Times New Roman as the text font and Computer Modern as the math font...
Addendum: On the subject of changing the width of the text block: Have a look at this answer for an example of how one may use the geometry package's commands \newgeometry and \restoregeometry to achieve this objective.
\documentclass{article}
\usepackage{mathtools}
\begin{document}
\subsubsection*{Fourier Transform properties}
{\def\arraystretch{2}\tabcolsep=10pt
\begin{tabular}{@{}l | l | l | l @{}}
Property & Time domain & Frequency domain & Condition \\
\hline
Time-shift & $f(t - \tau)$ & $\hat{f}(\omega)e^{-i \omega \tau}$ \\
Frequency-shift & $f(t) e^{i \omega_0 t}$ & $\hat{f}(\omega - \omega_0)$ \\
\rule{0pt}{5ex}% EXTRA vertical height
Modulation Thm. & $f(t)\cos(\omega_0 t)$ & $\dfrac{ \hat{f}(\omega-\omega_0)+\hat{f}(\omega+\omega_0) }{2}$ \\
Differentiation (time) & $f^{(n)}(t)$ & $(i\omega)^n \hat{f}(\omega)$ & $\displaystyle\lim_{\mathclap{t \to \pm \infty}} f(t) = 0$
\end{tabular}%
}
\end{document}
another possibility is to use package tabls. But this may cause problems when using other tabular packages. Try it and maybe the possible optional arguments are of interest, as minimal distance between tabulkar lines.
\documentclass{article}
\usepackage{mathtools}
\usepackage{tabls}
\begin{document}
\subsubsection*{Fourier Transform properties}
{\tablinesep=2ex\tabcolsep=10pt
\begin{tabular}{@{}l | l | l | l @{}}
Property & Time domain & Frequency domain & Condition \\
\hline
Time-shift & $f(t - \tau)$ & $\hat{f}(\omega)e^{-i \omega \tau}$ \\
Frequency-shift & $f(t) e^{i \omega_0 t}$ & $\hat{f}(\omega - \omega_0)$ \\
Modulation Thm. & $f(t)\cos(\omega_0 t)$ & $\dfrac{ \hat{f}(\omega-\omega_0)+\hat{f}(\omega+\omega_0) }{2}$ \\
Differentiation (time) & $f^{(n)}(t)$ & $(i\omega)^n \hat{f}(\omega)$ & $\displaystyle\lim_{\mathclap{t \to \pm \infty}} f(t) = 0$
\end{tabular}%
}
\end{document}
Best Answer
I'm assuming you need to add space between columns. You can do so by setting the width of column. In Lyx, highlight one of the entries in the column you wish to set (not just the text but the whole rectangular entry), right-click, then go to
More...andSettings. InColumn settingswill be a width parameter. In the LaTeX output, changing that parameter produces widths (90ptand151ptbelow):Alternatively, just add blank spaces to the longest entry in your column.