![]() You can also specify font type and size for the X-axis. The desired size of the resulting plot image in mysterious units. It’s useful for knowing which line represents what data.Īnd, of course, you want to tell GNUPlot to place the key in an appropriate location so it doesn’t clash with the rest of the plot. GNUPlot will create a little box with the plot key. You need to tell GNUPlot that you desire a timeline type of a plot. It will appear at the top of the resulting image. Let’s review the options in the /tmp/plot1.gnu file line by line. If you paid attention, you should now have a /tmp/plot1.png file that shows a plot of your three data types as a function of time. ‘/tmp/data1.dat’ using 1:5 title ‘Data 1’ with linespoints ‘/tmp/data1.dat’ using 1:4 title ‘Data 1’ with linespoints, ‘/tmp/data1.dat’ using 1:3 title ‘Data 1’ with linespoints, Let’s also suppose that this data file is /tmp/data1.dat.Ĭreate a new text file and call it, say, /tmp/plot1.gnu. Each value in columns 2, 3, and 4 is, therefore, a function of time. Below is a generic data sample where the first column is date/time, while the second, third and fourth columns represent three different types of data. ![]() The most common date/time format used by most databases and applications looks something like this: 11:42:12 or in general form: YYYY-MM-DD hh:mm:ss. Here are a few simple examples to get you over some problems that otherwise may not be obvious. It also seems that it’s one of the more capricious features of GNUPlot. Timeline plot is the most common type of a plot you would generate. GNUPlot is an open-source versitile data plotting and mathematical charting application.
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