Beamer annotated tables

I am trying to include some boxes around numbers in a table. I am using the method exactly described on the answer to question below:

Beamer, annotated tables using Tikzmark

The issue is that the first cell of the area surrounded by the box gets an extra space (if you see the example above you will see it). That's quite annoying. Why does it happen? How to solve it?

• It seems that inserting \unskip at the beginning of the cell (i.e. before the word "Slider" in the answer you linked) removes the extra space.. – campa Dec 14 '15 at 11:17
• The issue is that I have many boxes per table, starting at different cells, and doing that in all of them is very painful. – phdstudent Dec 14 '15 at 11:22
• It is an extra space created by hf-tikz (so that the box has a non-zero inner separation, I guess). – Bibi Dec 14 '15 at 14:40
• And any general solution to the issue? – phdstudent Dec 14 '15 at 14:45
• Well, due to the box, the width of the element in the first cell is increased, even if the box is not drawn... So either put the same space in front of all the first cells, or wait for the hf-tikz maintainer (or someone better than me ^^) to come up with a solution. – Bibi Dec 14 '15 at 14:56

The definition of the macros in the package fail to comment line endings in all of the necessary places. Since TeX interprets these as spaces, spaces are inserted.

The definition of \tikzmarkin involves numerous, nested conditional clauses. Here, I just tried to pick the one relevant to you and redefine that.

\RenewDocumentCommand{\tikzmarkin}{r<> o m D(){\belowrightoff} D(){\aboveleftoff}}{%
\IfNoValueTF{#2}{%true-val
\only<#1>{\tikz[remember picture,overlay]
\draw[line width=1pt,rectangle,disable rounded corners,fill=\fcol,draw=\bcol]
(pic cs:#3) ++(#4) rectangle (#5) node [anchor=base] (#3){}
;}%
}{%false-val
\only<#1>{\tikz[remember picture,overlay]
\draw[line width=1pt,rectangle,disable rounded corners,fill=\fcol,draw=\bcol,#2]
(pic cs:#3) ++(#4) rectangle (#5) node [anchor=base] (#3){}
;}}%
}

Note that my fix consists of the addition of two % signs at the end of lines. Obviously, this should be fixed for all cases and not just the Beamer-rounded-corners-fill-etc.-etc. one, but that is really best done in the package by its maintainer.

The results look like this:

Complete code for example:

\documentclass{beamer}
\mode<presentation>
{
\usetheme{CambridgeUS}
\usecolortheme{dolphin}
\setbeamercovered{transparent}
}
\usepackage{colortbl}
\usepackage{amsmath,amssymb,amsthm} %%% INCLUDE
\usepackage{multirow,booktabs,dcolumn}
\usepackage[beamer,customcolors]{hf-tikz}
\usetikzlibrary{calc}
\tikzset{hl/.style={%
set fill color=red!80!black!40,
set border color=red!80!black,
},
}
\RenewDocumentCommand{\tikzmarkin}{r<> o m D(){\belowrightoff} D(){\aboveleftoff}}{%
\IfNoValueTF{#2}{%true-val
\only<#1>{\tikz[remember picture,overlay]
\draw[line width=1pt,rectangle,disable rounded corners,fill=\fcol,draw=\bcol]
(pic cs:#3) ++(#4) rectangle (#5) node [anchor=base] (#3){}
;}%
}{%false-val
\only<#1>{\tikz[remember picture,overlay]
\draw[line width=1pt,rectangle,disable rounded corners,fill=\fcol,draw=\bcol,#2]
(pic cs:#3) ++(#4) rectangle (#5) node [anchor=base] (#3){}
;}}%
}
\begin{document}

\begin{frame}{Regression Results}{Participation}

\begin{table}
\resizebox{0.86\textwidth}{0.4\textheight}{
\begin{tabular}{lcccccc} \hline
& \multicolumn{3}{c}{Dependent Variable:} &  \multicolumn{3}{c}{Dependent Variable:} \\
& \multicolumn{3}{c}{Effort>0} &  \multicolumn{3}{c}{Effort>5} \\
\cline{2-4} \cline{5-7}
Variables & (1) & (2) & (3) & (4) & (5) & (6) \\
\hline
&  &  &  &  &  &  \\
\tikzmarkin<2>[hl]{H1}Slider & -0.019 & -0.031 & -0.038 & -0.037 & -0.051 & -0.055 \\
& (0.069) & (0.068) & (0.068) & (0.068) & (0.067) & (0.066)\tikzmarkend{H1}\\
Early Departure  & -0.143** & -0.160** & -0.147** & -0.204*** & -0.222*** & -0.209*** \\
& (0.070) & (0.070) & (0.070) & (0.069) & (0.068) & (0.069) \\
Pause  & -0.427*** & -0.430*** & -0.425*** & -0.694*** & -0.697*** & -0.691*** \\
& (0.068) & (0.068) & (0.067) & (0.067) & (0.066) & (0.066) \\
20-Minute  & -0.036 & -0.040 & -0.037 & -0.035 & -0.040 & -0.036 \\
& (0.069) & (0.068) & (0.068) & (0.067) & (0.066) & (0.066) \\
Threshold  & -0.284*** & -0.282*** & -0.272*** & -0.266*** & -0.263*** & -0.254*** \\
& (0.068) & (0.068) & (0.067) & (0.067) & (0.066) & (0.066) \\
Flat Wage  & 0.037 & 0.020 & 0.031 & 0.056 & 0.038 & 0.041 \\
& (0.069) & (0.069) & (0.069) & (0.068) & (0.067) & (0.067) \\
Effort Choice & -0.606*** & -0.608*** & -0.601*** & -0.766*** & -0.769*** & -0.759*** \\
& (0.068) & (0.068) & (0.068) & (0.067) & (0.066) & (0.066) \\
Constant & 0.963*** & 1.111*** & 0.989*** & 0.944*** & 1.102*** & 1.051*** \\
& (0.049) & (0.064) & (0.159) & (0.048) & (0.062) & (0.155) \\
&  &  &  &  &  &  \\
Observations & 434 & 434 & 434 & 434 & 434 & 434 \\
R-squared & 0.277 & 0.298 & 0.316 & 0.429 & 0.448 & 0.463 \\
\% invested in Risk Task & N & Y & Y & N & Y & Y \\
Controls & N & N & Y & N & N & Y \\
\hline
\multicolumn{7}{c}{ Standard errors in parentheses} \\
\multicolumn{7}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.10} \\
\end{tabular}
\begin{tikzpicture}[remember picture,overlay]
\node<2>[left=-3pt,anchor=west,yshift=1.5ex,font=\small] at (pic cs:H1) {Comment};
\end{tikzpicture}
}
\end{table}

\end{frame}

\end{document}
• Note that the numbers would be improved by use of something like siunitx. – cfr Dec 16 '15 at 3:19