I have the problem that i get an error message (dimension too large) when i try to draw an e-function:

```
\documentclass[BCOR=3mm,11pt,headsepline,footsepline]{scrbook}
\usepackage[ngerman]{babel}
\usepackage[utf8]{inputenc}
\usepackage{multirow}
\usepackage{pgf,tikz}
\usepackage[framemethod=tikz]{mdframed}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage[dvipdfm]{geometry}
\usepackage{tabulary}
\usepackage{subfigure}
\usepackage{float}
\usetikzlibrary{arrows}
\usetikzlibrary{shapes,snakes}
\usepackage{ntheorem}
\geometry{
inner=2cm,
outer=2cm,
top=2cm,
bottom=2.5cm,
head=2cm,
footnotesep=1cm,
% bindingoffset=1cm,
}
\mdtheorem[%
apptotikzsetting={\tikzset{mdfbackground/.append style=%
{top color=white,
bottom color=white},
mdfframetitlebackground/.append style =%
{top color=gray!10!white,
bottom color=gray!10!white}
}},
,roundcorner=10pt,middlelinewidth=1.3pt,
frametitlerule=true,frametitlerulewidth=1.3pt,
innertopmargin=10pt,%
]{wissen}{Fehlerschwerpunkt}
\begin{document}
\begin{tikzpicture}[scale=0.9, >=latex,y=7cm,x=1cm]
\draw[-angle 45,line width = 0.8pt] (-6,0) -- (6,0) node[right] {\scriptsize $x$};
\draw[-angle 45,line width = 0.8pt] (0,-0.1) -- (0,0.5) node[above] {\scriptsize $y$};
\foreach \x in {-5,-4,...,-1,1,2,...,5} \draw (\x, 3pt) -- (\x,-3pt) node[anchor=north] {\tiny \x};
\foreach \y in {0.1,0.2,0.3,0.4} \draw (3pt,\y) -- (-3pt,\y) node[anchor=east] {\tiny \y};
\draw[color=red, line width = 1pt, domain=-4:5, samples=100] plot (\x,{(9*exp(\x))/(exp(\x)+9)^2});
\end{tikzpicture}
\end{document}
```

## Best Answer

For plots you are better of using

`pgfplots`

:## Code: