You can use pgfplots to plot your own functions. There’s no standard macro for it, but the function isn’t too complicated and can be added as a pgfmath function.

This code was written by Jake on TeX.SE.

Edit and compile if you like:\documentclass[border=10pt]{standalone} \usepackage{pgfplots} \pgfplotsset{width=7cm,compat=1.8} \pgfmathdeclarefunction{gauss}{2}{% \pgfmathparse{1/(#2*sqrt(2*pi))*exp(-((x-#1)^2)/(2*#2^2))}% } \begin{document} \begin{tikzpicture} \begin{axis}[every axis plot post/.append style={ mark=none,domain=-2:3,samples=50,smooth}, % All plots: from -2:2, 50 samples, smooth, no marks axis x line*=bottom, % no box around the plot, only x and y axis axis y line*=left, % the * suppresses the arrow tips enlargelimits=upper] % extend the axes a bit to the right and top \addplot {gauss(0,0.5)}; \addplot {gauss(1,0.75)}; \end{axis} \end{tikzpicture} \end{document}