\documentclass[border=2mm,tikz]{standalone} \usepackage{tikz} \usetikzlibrary{datavisualization} \usetikzlibrary{datavisualization.formats.functions} \begin{document} \begin{tikzpicture} \datavisualization [school book axes, visualize as smooth line, y axis={label={$y=x^2$}}, x axis={label} ]
data [format=function] { var x : interval [-1.5:1.5] samples 7; func y = \value x*\value x; }; \end{tikzpicture}
\begin{tikzpicture} \datavisualization [scientific axes=clean, y axis=grid, visualize as smooth line/.list={sin,cos,tan}, style sheet=strong colors, style sheet=vary dashing, sin={label in legend={text=$\sin x$}}, cos={label in legend={text=$\cos x$}}, tan={label in legend={text=$\tan x$}}, data/format=function ] data [set=sin] { var x : interval [-0.5pi:4]; func y = sin(\value x r); } data [set=cos] { var x : interval [-0.5pi:4]; func y = cos(\value x r); } data [set=tan] { var x : interval [-0.3pi:.3pi]; func y = tan(\value x r); }; \end{tikzpicture} \end{document}