1. Basic Usage of GnuPlot Hyun Hee Shim Department of Physics Kangwon National University

2. What is GnuPlot? GnuPlot is a command-driven interactive function plotting program. Introduction Operation 1.Plotting of two dimensional functions and data points in many different style. 2.Plotting of three dimensional data points and surfaces in many different style.

3. Starting and Quitting the GnuPlot Starting : To start the GunPlot under Unix, just type the command “gnuplot”. Quitting : To exit GnuPlot, you can type either quit, exit or simply q. Basic screen of GnuPlot

4. Menubar in the Gnuplot File PlotExpressions On the menu bar, you can use the source wish to select.

5. Function General Axis Chart 3DStyle

6. Plotting function To start exploring GnuPlot, try the following command. : The first plot command produces a plot of function. In the first example, the range of x is not specified, so GnuPlot use its default range of (-10,10). Plot Function Ex) plot cos(x)

7. Ex) plot [-pi : pi] sin(x**2),cos(exp(x)) The second plot command produces a plot of the functions sin and cos on the same graph, with x in the range (-π, π). In the second example, the phrase [-pi:pi] following plot tells GnuPlot to produce the plot with x in the range This tells GnuPlot to plot both functions on the same plot. Plot interval function

8. Plotting the data gnuplot> plot “map.dat” u 1:2 t “” w p 3 Represented data Explanation : Point style using 3 color is pressed w p 3. : File for map.dat plot using data. : First column equal to x,second column equal to y. (u 1:2)

9. Summary GnuPlot is function plotting program using the command. GnuPlot can plot data.