The last column in our CSV file is a different unit but influences the other The legend is correct, and we have axis labels. Set ylabel "First Y Units" # label for the Y axis Set key autotitle columnhead # use the first line as title We'll also add a label to the X and Y axis: set datafile separator ',' The CSV file has column headers in the first line: "datetime","targetValue","measuredValue","secondYAxisValue", Legend has the plot commands, there is no grid and we're missing our second YĪxis. But the graph is still a bit hard to read. The basics are there, our two lines on the Y axis and Set format x "%H:%M:%S" # otherwise it will show only MM:SS Set timefmt "%Y-%m-%dT%H:%M:%S" # specify our time string format Set xdata time # tells gnuplot the x axis is time data Update your gnuplot file: set datafile separator ',' Let's tell gnuplot to use the first column as x axis datetime and The first column of our CSV file contains the date and time in an ISO8601įormat. Using the first column as x axis date time Run gnuplot, with -p to make the window persist: gnuplot -p example.gnuplot The first line tells gnuplot to use a comma instead of whitespace to seperate Plot plot.csv using 1:2 with lines, '' using 1:3 with lines Create a file namedĮxample.gnuplot in the same folder as your csv file and put the following in Let's start with the basic setup and command. Here is a picture of the finished result we're working towards: To append some data to the title of the graph. Not valid CSV, but we'll use that inside gnuplot The data is fromĪnother piece of software I've written and contains extra information, but that The article will go over the different topics step by step. You canįind my example CSV data at the bottom of this article. I'm using gnuplot 5.2 on Ubuntu 18.04, installed via the repository. With this referral link you'll get $100 credit for 60 days. You can also sponsor me by getting a Digital Ocean VPS. It means the world to me if you show your appreciation and you'll help pay the server costs. Go check it out!Ĭonsider sponsoring me on Github. I'm developing an open source monitoring app called Leaf Node Monitoring, for windows, linux & android. Please, if you found this content useful, consider a small donation using any of the options below: Recently I removed all Google Ads from this site due to their invasive tracking, as well as Google Analytics. The data in this article is masked, but that I've got an article published here where you can read howto make aīar-chart (histogram) with gnuplot.
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