)Ī brief example will clarify every doubt. The right syntax, from the gnuplot 5.1 documentation is sprintf("format", x, y. Rather than a subscript, and noenhanced specifier is fundamental to obtain this result.Īnother possible path to follow is using the sprintf function that worksīasically the same as the C-language sprintf. Title "file\_".i.".dat" has been written with the \ in order to make the _ symbol in the name of the files appears as an underscore The loop starts with for "file_".i.".dat" and execute the plot command until it reaches i = 3. Will plot all the files between file_1.dat and file_N.dat in the same graph.Ĭommands set terminal postscript color noenhanced #setting the term file_1.datĮxecuting the command plot for "file_".i.".dat" Assuming you have N files named sequently, i.e. The simplest method to plot multiple data files is to insert a for loop inside the plot command of ![]() Plotting multiple data files First method - Concatenation of strings The grid is often useful when plotting a data set. All values (start, stop and increment) are casted to integer values. For example for will increment i from 0 to 6 in 2 steps: i = 0, 2, 4, 6. In these case the for iteration loop results very useful: p for "data_set.dat" using 1:col w lpīriefly the for iteration increment the variable in the loop, in this case col, with a decided steps (if not specified = 1). In the case you have more columns and want to plot them all in the same graph just pass to the plot function any argument you prefer, by separating them with a ,: p "data_set.dat" u 1:2 w lp,\Īnyway sometimes there could be too much columns to write one by one. # the abbreviated form is completely equivalent: In fact, it is often possible to plot a file with lots of lines of garbage at the top simply by specifying plot 'file' using 1:2 However, if you want to leave text in your data files, it is safer to put the comment character () in the first column of the text lines. E.G.: plot "data_set.dat" using 1:4 with linespoint An useful style for data plotting is linespoint which is, obviously, "lines points". Which will plot the same as if you do not type with point. As said before, the default style is point plot "data_set.dat" using 1:4 with point There are also different style (see gnuplot documentation or Selecting a plotting style for further infos) for plotting points. In the case your data set is a tridimensional file just use splot ad add the z-column splot "data_set.dat" using 1:2:3 Which means "plot the file using column 2 as X and column 4 as Y". To specify the columns to be plotted use the using specifier plot "data_set.dat" using 2:4 The default settings will use the first two columns of your data file, respectively x and y. Gnuplot will produce a graph in your output destination. Now everything is ready to make the data plot: by typing only plot "data_set.dat" # Prototype of a gnuplot data setĪs you can see you can write in your data set in floating point notation. The default gnuplot command plot (also only p) plot dataset with columns, of the form of the data_set.dat file below. plot datafile using column_expression with style. ![]() Plotting a data file is really simple with gnuplot, actually, once you have opened the software from the terminal, you only need to digit the command plot 'file' to get an automatic plot.įirst of all, before plotting, you must be sure to be under the same directory where the data file is, otherwise you'll eventually get a warning. You can then use the plot command above for data files where the numbers are separated by commas.One of the main useful features of gnuplot is the possibility of plotting data files. csv file then if you use the gnuplot command set datafile separator comma Note that the command above assumes that you have a file named ls.dat with tab separated columns of data where column 1 is x, column 2 is y1, column 3 is y2 and column 4 is 圓. In each case it is 'using x-value-column: y-value-column' plot 'ls.dat' using 1:2, 'ls.dat' using 1:3, 'ls.dat' using 1:4 I post it because it makes more sense to me. In addition to the answers above the command below will also work. This will keep your datafile in the correct order, but also preserve your version tic labels on the x-axis. One minor addition, try this (for example) plot 'ls.dat' using 4:xtic(1) "ls.dat" using 4 title 'Modified' with linesĪndyras is completely correct. "ls.dat" using 3 title 'Added' with lines, \ Try: plot "ls.dat" using 2 title 'Removed' with lines, \ That will plot those values on the y axis and integers on the x axis. That should put the points in the right order.Īlternatively, you could plot using X, where X is the column number you want, instead of using 1:X. I think your problem is your version numbers.
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