First of all, please note the context of that demo page you're quoting: that's about a (quite probably locally extended) version 3.5 of gnuplot. That demo script is 11 years old! It's not exactly a surprise it doesn't quite work unmodified any more, is it?
There is a bug involved, too, though. Auto-computation of boxwidth is apparently broken for 'boxerrorbar'.
As a workaround, plot the file twice, once 'with boxes', the other time 'with errorbars'.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
hello,
I am trying to plot boxes with y error bar, something looking like the boxerrorbars demo of this link:
http://www.csse.uwa.edu.au/programming/gnuplot_demos/errorbar/errorbar.html
Unfortunately, the boxwidth seems to be impossible to change. With the 4.0 version, I got thin lines instead of boxes. Here is my script:
set term post solid
set out 'test.ps'
set boxwidth -2
set data style boxerrorbars
plot 'data.dat' using 1:2:3:4
!gv test.ps&
and the data file:
0 32.9909 5.56923 0.5
1 32.7166 5.50846 0.5
2 29.8714 5.44986 0.5
3 28.9586 5.45015 0.5
4 21.1212 5.5851 0.5
5 9.50057 5.92878 0.5
6 10.3279 5.6467 0.5
7 9.75723 5.81278 0.5
8 7.10414 5.89831 0.5
9 0.243534 5.96102 0.5
Am I missing something or this could be a bug?
Thank you
Philippe
First of all, please note the context of that demo page you're quoting: that's about a (quite probably locally extended) version 3.5 of gnuplot. That demo script is 11 years old! It's not exactly a surprise it doesn't quite work unmodified any more, is it?
There is a bug involved, too, though. Auto-computation of boxwidth is apparently broken for 'boxerrorbar'.
As a workaround, plot the file twice, once 'with boxes', the other time 'with errorbars'.
Thank you for the quick answer. Good to know that it is a bug.
I was aware that the page I referred to is quite old. The purpose was simply to show the kind of graph I wanted.
Thanks again
I've since fixed the program to match the documentation, and thus the old demo, too.