#GNUPLOT LINE THICKNESS INSTALL#

Manipulating the Bash/awk script can be a little complex but it’s incredible useful to be able to use output from almost any command line utility in Gnuplot. I won’t give up using plotting packages like MatPlotlib or ggplot, but I was very impressed how easy it was to create real-time plots using Gnuplot. To run this script enter: $ gnuplot -persist line_fan_cpu.txt Final Comments To get the status of GPIO pin 9: gpio read 9īy adding some Bash and awk script it is possible to create a gpio.dat file: $ gpio read 9 The status of GPIO pins can be found using the gpio command line utility. The previous example used a manually created gpio.dat data file. Gnuplot> plot 'gpio.dat' using 1:3:xtic(2) with boxes title '' Real-Time Bar Chart of PI GPIO The interactive commands to plot the file: $ gnuplot The plot using 1:3:xtic(2) argument will make the first column in the data file the x-position, the third column the y-value and the x-labels be the second column. To plot a bar chart the fill style and bar width needs to be defined. # column1 = chart position, column2 = heading, column3 = value # gpio.dat - data file for GPIO pin values A Static Bar ChartĪ simple but useful example of Gnuplot would be to show the realtime status of the Raspberry Pi General Purpose Input/Output (GPIO) pins as a bar chart.Ī bar chart presentation can be created using a data file of: For this example the plot command will use the data in the $Mydata variable and create a line chart. The end-of-data delimiter (EOD in the example) may be any sequence of characters. $ gnuplotĭata block names must begin with a $ character, which distinguishes them from other types of persistent variables. Below is an example where 4 sets of data points are plotted in a line chart. gnuplot or Excel are to blame for this since these programs make it very convenient to. When Gnuplot is run manually the charting instructions and data values can be inserted directly. 12.2.1 Graphic Parameters: Line Width, Line Cap, and Line Join. Gnuplot is typically run as a command line utility, but it can also be run manually.

#GNUPLOT LINE THICKNESS INSTALL#

To install Gnuplot on Ubuntu: sudo apt-get install gnuplot

Gnuplot can be installed on Linux, Windows, and Mac. This will be the case until the 'quit' command is issued to gnuplot to terminate the process and return to the shell. The first will show the status Raspberry Pi I/O pins, and the second example will be a line chart of CPU diagnostics. gnuplot Note the initial display from the gnuplot program, and the terminal prompt changing from the shell prompt to 'gnuplot>', indicating the gnuplot process is accepting terminal input. In this blog I’ll introduce Gnuplot and show two examples. ( For simple Bash applications it is possible to create charts in just 1 line.) I was amazed that I could make real-time bar and line charts in only 20 lines of scripting code. Gnuplot has been around for quite awhile and I was happily surprised at what it can do. There are some excellent charting and plotting packages but if you’re like me you sometimes want to do a quick test plot to capture some realtime data.

Gnuplot line thickness