LaTeX-examples/tikz/karnaugh-map/karnaugh-map.tex

\documentclass{article}
\usepackage[pdftex,active,tightpage]{preview}
\setlength\PreviewBorder{2mm}

\usepackage[dvipsnames]{xcolor}
\input{kvmacros}

\begin{document}
\begin{preview}
	\karnaughmap{4}{$f(w,x,y,z)$}{{$w$}{$x$}{$y$}{$z$}}%
	{
		1100
		1100
		0011
		0101
	}
	{
		% Long one at top
		\textcolor{Blue}{
			\put(2,3.5){\oval(3.9,0.9)[]}
		}
		\textcolor{WildStrawberry}{
			\put(0.9,3.5){\oval(1.7,0.8)[]}
		}
		% two left
		\textcolor{Green}{
			\put(0.7,1.5){\oval(1.9,0.9)}
		}
		\textcolor{Sepia}{
			\put(1.5,1.5){\oval(1.6,0.7)}
		}
		\textcolor{Red}{
			\put(1.92,1){\oval(0.9,1.9)}
		}
		\textcolor{LimeGreen}{
			\put(1.76,-0.2){\oval(0.9,2.1)[t]}
			\put(1.76,4.2){\oval(0.9,2.1)[b]}
		}
	}
\end{preview}
\end{document}