Gnuplot xrange not really a range?

问题

I try to make a plot on gnuplot which has no real range order on x-axis.

--------------------->
1 4 2 20 17 12 10 8

It's therefore not a real function as you would interpret it with math knowledge, but it has some sort of index on its x-axis which has no numbering order and runs from 1-20 but 20 could be the first, or in the middle.. everything may be mixed.. hope you understand what I mean cause I am hoping gnuplot can handle that.

maybe i can write my data file so that point 2 contains the data that should be there on the y-axis and just move the labels around on x-axis?

回答1:

You could e.g. write a datafile "data" containing such values

1     1.5
4     2
2     3.2
20    2.2
17    0.4
12    4.3

The second column are the "y-values", the first column the labels of the x-axis (xtics)

now try to plot this data with:

plot './data' u 2:xticlabel(1)

is that what you want?

回答2:

Solution is using xticlabels and add an extra column in the data file. ie

#xdata ydata label 
0 2 1 
1 3 14
2 10 0 
3 8 20 
etc. 

command: plot "data.dat" using 1:2:xticlabels(3) with lp"

来源：https://stackoverflow.com/questions/8922936/gnuplot-xrange-not-really-a-range