Detail on monotony table

Question

Well here is what I finally want to achieve.

The following code:

\documentclass[10pt]{article}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage[english,greek]{babel}
\usepackage[iso-8859-7]{inputenc}
\usepackage{pgf,tikz}
\usepackage{tkz-tab}
\usetikzlibrary{shapes,snakes,arrows,backgrounds}
\usetikzlibrary{scopes,svg.path,shapes.geometric,shadows}
\usepackage{color}

\begin{document}


\begin{center}
\begin{tikzpicture}
\tkzTabInit[espcl=2]
 {$x$/1,$f'(x)$ /1, $f(x)$ /2}{$-\infty$,$0$, $1$ , $+\infty$}%
 \tkzTabLine{,+,d,-,z,+}
 \tkzTabVar[color=red]%
 { -/ $-\infty$ / ,+D+/$0$ / $+\infty$ , -/ $e$ , +/ $+\infty$}
 \end{tikzpicture}
 \end{center}
 \end{document}

prodcues this motonony table.

The result is perfect. However, is it possible that the dashed line that I have under 1 displaying the zero of the derivative be extended further down till e? That is the dashed line covers also the other cell of f reaching down till e ?

I have not found something in the Altermundus manual, so I guess this cannot be done (?) .

Answer 1

Here's one option using a \draw and the internal names associated to the nodes in tkz-tab to extend the line downwards up to the "e":

\draw[dotted] (N32) -- (FR32);

The complete code:

\documentclass[10pt]{article}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage[english,greek]{babel}
\usepackage[iso-8859-7]{inputenc}
\usepackage{pgf,tikz}
\usepackage{tkz-tab}
\usetikzlibrary{shapes,snakes,arrows,backgrounds}
\usetikzlibrary{scopes,svg.path,shapes.geometric,shadows}
\usepackage{color}

\begin{document}

\begin{center}
\begin{tikzpicture}
\tkzTabInit[espcl=2]
 {$x$/1,$f'(x)$ /1, $f(x)$ /2}{$-\infty$,$0$, $1$ , $+\infty$}%
 \tkzTabLine{,+,d,-,z,+}
 \tkzTabVar[color=red]%
 { -/ $-\infty$ / ,+D+/$0$ / $+\infty$ , -/ $e$ , +/ $+\infty$}
\draw[dotted] (N32) -- (FR32);
\end{tikzpicture}
\end{center}
\end{document}