[Tex/LaTex] Automatic scaling of kiviat diagrams

Question

\documentclass[twoside,a4paper,12pt]{article}
\usepackage[usenames,dvipsnames,svgnames,table]{xcolor}
\usepackage[upright]{fourier}
\usepackage{tkz-kiviat,numprint,fullpage}
\usetikzlibrary{arrows}
\usepackage{polyglossia}
\setmainlanguage{magyar}
\begin{document}


\begin{tikzpicture}
\tkzKiviatDiagram[label distance=.5cm, scale=0.3]{Introvertált,Oldott,Extrovertált,Feszült}
\tkzKiviatLine[thick,color=blue,mark=none,
               fill=blue!20,opacity=.5](
        37.5,
        50.0,
        13.3333333333,
        10.5263157895
    )
\tkzKiviatGrad[prefix=,unity=10,suffix=\ \%](1)
\end{tikzpicture}

\end{document}

Result:

For some reason, the 100% value in the lattice looks smaller than value=50. I could not find out how to adjust the diagram so that data remains inside the axes.

Another question: if I don't scale the whole diagram by 0.3, then it goes off the page. Why is that? Is it possible to adjust the diagram to textwidth of the current page?

Answer 1

You can find a french (sorry) documentation here

The number of latices is determined by an option : lattice. By default the number of lattices is 10. You need to use number between 0 and 10 to draw a kiviat line if you keep the default number. The number determines the lattice, for example you can use 20 lattices :

\documentclass[]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[upright]{fourier}
\usepackage[usenames,dvipsnames]{xcolor}
\usepackage{tkz-kiviat,numprint,fullpage}
\usetikzlibrary{arrows}
\thispagestyle{empty}

\begin{document} 

\begin{tikzpicture} [scale=.5]
   \tkzKiviatDiagram[lattice=20]{A,B,C,D,E} 
   \tkzKiviatLine[thick,
                  color      = blue,
                  mark       = ball,
                  mark size  = 4pt,
                  fill       = blue!20,
                  opacity=.5](4,3,20,15,10)
\end{tikzpicture} 
\end{document} 

But I think it's preferable to keep 10 in a great majority of cases. If you have 5 lattices, you need to use numbers between 0 and 5.

Update

With two grades :

\begin{tikzpicture}
\tkzKiviatDiagram[scale   = .6,
                  gap = 1,
                  lattice = 5]{%
McCabe,LOC,Live Variables,Halstead N,Variablenspanne}
\tkzKiviatLine[thick,color=blue,mark=none,
               fill=blue!20,opacity=.5](3,3.5,3,3.5,3)
\tkzKiviatLine[thick,color=darkgray,
               fill=green!20,opacity=.5](0.5,1,0.5,0.75,1)
\tkzKiviatLine[ultra thick,mark=ball,
                 mark size=4pt,color =Maroon](2,3.75,1,1.5,2)
\tkzKiviatGrad[prefix=,unity=100,suffix=\ \texteuro](1) 

\tkzKiviatGrad[prefix=,unity=20,suffix=\ \%](3)  
\end{tikzpicture}

It's also possible to use tikz to create a diagram but you need to look at the code to know some coordinates used in the drawing. it's possible !