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gnuplot

GNUplot doesn't print lines

I'm having this script to plot some data in Gnuplot. Unfortunately, my plot doesn't print the lines, only the dots.

What have I done wrong?

#!/usr/bin/gnuplot
reset
set terminal png
set output 'picture.png'
set xlabel "n"

set ylabel "time (s)"
set yrange [0:2]

set title "title"
set key reverse Left outside
set grid
set style data linespoints

plot "bla.txt" using 1:2 title "bla" with linespoints ls 1
Solution

  • Most probably, your data file contains empty lines between successive data entries.

    A data file with 

    1 2

2 4

5 6

    shows only three points when plotted with 

    plot 'data.txt' using 1:2 with linespoints

    whereas a data file

    1 2
3 4
5 6

    also shows connecting lines.

    That is simply how gnuplot handles its data files.