Gnuplot exponential software#

Plot h(x) ls 1,x-4 lw 3 # plot h(x) using linestyle 1, on the same graph plot x-4 linewidth 3Įntering the word test at the Gnuplot command prompt and pressing enter will run the terminal test. H(x)=f(x)/g(x) # yes, algebra can be done on function notation Set yrange # set the y-axis to run -20 to 10 Set xrange # set the x-axis to run -10 to 10 Set style line 1 lw 3 # set user defined linestyle 1 to linewidth 3 Set yzeroaxis lt 2 lw 2 # set the y-axis to linetype 2 linewidth 2 Set xzeroaxis lt 2 lw 2 # set the x-axis to linetype 2 linewidth 2 Set xtics 1 # set the x-axis to display at an interval of one Reset # reset restores Gnuplot to startup configuration The # character causes Gnuplot to ignore the rest of the line, I have borrowed this convention to explain the commands issued. The file contains a number of useful commands for formatting a file. The list of commands in the text file could have been entered one at a time from the keyboard and the resulting plot would have been the same. Upon loading, due to the plot command in the file, a plot appears. The load command, path, and filename could be hand typed from the command line using the pattern shown above. plt file was saved and open the file.Īfter the file is opened, Gnuplot's command line will show the file and path that was loaded. After that Gnuplot will open in the last folder from which a file was opened. Gnuplot will first open in its own home folder. plt extension.Ĭlick on the Open button in Gnuplot. With Notepad set to save as All Files, manually type the name and. Using Notepad, be sure to switch the Save as type: to All Files or Notepad will unhelpfully tack on a. Type the commands into a text editor, then save as a. Notepad or any other text editor will easily create the The easiest way to do this is to create a text file of the commands and then open that file with Gnuplot. I find myself fiddling with settings repeatedly. One common use I have for Gnuplot is the production of graphs for tests and quizzes. Instructor's use: making graphs for tests Note the use of f(x)= x**2-2*x-15 and then the plotting of f(x). The range for x and y are specified by the set xrange and set yrange commands. The border is the border on the plot, the grid are the grid lines. The last command then produces the plot seen below.

The appearance on the computer screen can be seen on the right. Gnuplot helpfully reminds one of what is being graphed in the upper right corner.Ĭommands can be issued in a sequence to modify the graph appearance. Thus plot x**2+8*x+15 produces a quadratic with x-intercepts at -3 and -5. Gnuplot uses two asterisks for exponentiation. Here is the one place Gnuplot differs from the convention used in most other programs. Graphing an exponent requires telling Gnuplot that you are raising the variable x to an exponent. Gnuplot has hundreds of command and argument combinations that can be used to produce grids, borders, variable line widths, line colors, and line styles.

Gnuplot exponential software#

The above graph was reduced in size using photoimaging software from the original size. The above graph is rather unadorned and plain. Note that an asterisk is used for multiplication. Type plot 2*x+5 as seen above and a graph will appear. If the command is a plot command, a graph will appear. Type a command and appropriate arguments for the command and then press enter. I prefer Lucida console 10 point, a font that like typewritten letters produced equally spaced letters. Right click on Gnuplot and select Choose font. After installation and launch, Gnuplot may appear unreadable.

This guide does not cover installation of Gnuplot. Gnuplot 4.0 for instructors and students Gnuplot