Demos for gnuplot version 5.2 (pngcairo terminal)
See also the demo output for the SVG and canvas terminals.

Gnuplot is distributed with a large set of demonstration scripts. Here are samples of PNG output from some of the demos.

Basic 2D plot styles simple functions filled curves fill between curves candlesticks error bars histograms (more) bar graphs step functions multiple axis scales mixing styles variable size points parallel axis plots parametric functions piecewise functions vector fields circles boxplots rug plot jitter (bee swarm) text Math functions approximation complex trig functions complex error function probability probability (more) random numbers recursion, etc... data statistics Curve fitting cubic and Bezier splines monotonic csplines explicit B-splines explicit Bezier splines Levenberg-Marquardt DLS Animation animated gif	3D plots and surfaces surfaces 1 surfaces 2 contours singularities hidden surfaces pm3d coloring pm3d hidden surfaces 3D mapping shaded error region azimuth circles and polygons lighting model Coordinate and axis transforms linked axes nonlinear axes broken axes polar coords polar functions polar data cylindrical/spherical time/date coords coord sampling ranges Binary and Image data binary data image data binary and image tricks RGB + alpha channel bar chart art Colors data-dependent coloring RGB coloring RGB + alpha channel pm3d colors pm3d gamma	Sample Applications control models discrete contours financial data iteration non-gridded data running averages automatic binning binning/histograms arrays fence plots Gantt chart 2D and 3D heat maps solar path diagram violin plot Text options rotated text 'enhanced' text string data boxed text variable font size string variables hypertext (no png support) Page Layout multiplot layout multiple plots aligned plots axis location axis ticmarks rectangles customized key Styles line and arrow styles fill styles dashed lines transparency transparent solids