The first line of the table contains the names of the data series, it should not be output as data. This does not cause a visible issue (Gnuplot produces a warning but still generates the plot), except if the first cell of that line is the string "Event" (no warning is issued if the string is something else!).
The first line of the table contains the names of the data series, it should not be output as data. This does not cause a visible issue (Gnuplot produces a warning but still generates the plot), except if the first cell of that line is the string "Event" (no warning is issued if the string is something else!).