[Gnuplot-py-users] problems with dates on x-axis (ValueError: setting an array element ...)

[manuel a. <al...@gm...>]

Following crashes,
===
...
 >>> gp = Gnuplot.Gnuplot(persist = 1)
 >>> gp('set xdata time')
 >>> gp('set timefmt "%Y-%m-%d"')
 >>> data = [['2010-01-01',1] ['2010-02-02',2]]
 >>> plot1 = Gnuplot.PlotItems.Data(data, with_="lines")
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "/usr/lib/python2.6/dist-packages/Gnuplot/PlotItems.py", line 
549, in Data
     data = utils.float_array(data[0])
   File "/usr/lib/python2.6/dist-packages/Gnuplot/utils.py", line 33, in 
float_array
     return numpy.asarray(m, numpy.float32)
   File "/usr/lib/python2.6/dist-packages/numpy/core/numeric.py", line 
230, in asarray
     return array(a, dtype, copy=False, order=order)
ValueError: setting an array element with a sequence.


I read that it is known issue, the communication between python and 
native gnuplot works with passing arrays. In my case they don't have 
expected pattern/structure.

Does somebody know workaround so it works directly in python script? 
Currently I spit out .csv data to file and then "natively" plot it under 
gnuplot console.

I am using gnuplot.py 1.8-1.1 with transitive dep to numpy 1.3.0.

thanks.

-- 
  manuel aldana
  al...@gm...
  software-engineering blog: http://www.aldana-online.de