gnuplot-py-users Mailing List for Gnuplot.py

BBands wrote:

>I'd like to use the new xticlabels function. I have
>tried this:
>
>pData = Gnuplot.Data(date, open, high, low, close,
>using = '0:2:3:4:5:xticlabels(1)', with =
>'financebars')
>
>but gnuplot.py wants date to be a float.
>
>Any thoughts?
>  
>

Gnuplot.py doesn't know how to output dates.  And since it uses Numeric 
arrays to store data, it wouldn't be trivial to fix this for the general 
case.

So you probably need to write your data to a temporary file yourself 
(using a date format that can be understood by gnuplot), then plot the 
data directly from the file.

If you want to get fancier, then you can define a new PlotItem that 
knows how to output dates, then the whole Gnuplot.py infrastructure 
should simply work.

There was just a discussion on this mailing list about plotting dates.  
See the archives.

Michael

This is the well-known problem that the temporary files can be deleted 
before gnuplot is done using them.  Please see the first question of the 
FAQ.

Michael

Florian Lindner wrote:

>Hello,
>I've the python script:
>
>import Gnuplot
>
>g = Gnuplot.Gnuplot(debug=1)
>g.title('A simple example')
>g('set data style linespoints')
>g.plot([[0,1.1], [1,5.8], [2,3.3], [3,4.2]]
>
>taken from demo.py.
>
>When I try to execute:
>
>florian@horus ~/python $ python plot.py
>gnuplot> set title "A simple example"
>gnuplot> set data style linespoints
>gnuplot> plot '/tmp/tmpzCyAzN' notitle
>
>gnuplot> plot '/tmp/tmpzCyAzN' notitle
>              ^
>         can't read data file "/tmp/tmpzCyAzN"
>         line 0: util.c: No such file or directory
>
>
>What is wrong there?
>  
>