Hi, I found the same problem, but no answer:
enter the link here
My problem is that I am trying to build data using matplotlib and linking the first and last data points. I use python27 and Windows 7. My problem is just big to show the full, so I just show some parts of the source code. The graph function looks like this:
def plot(x, aw,temperature):
plt.clf()
temperatureplot = plt.subplot(211)
awplot = plt.subplot(212)
temperatureplot.grid()
awplot.grid()
awplot.set_ylabel('water activity aw')
awplot.plot(x,aw)
awplot.margins(y=0.05)
temperatureplot.set_ylabel('Temperature in degree C')
temperatureplot.plot(x,temperature)
temperatureplot.margins(y=0.05)
awplot.set_xlabel('Time in [hm]')
plt.gcf().canvas.draw()
I use this because I plan it on Tkinter Gui and want to update it sometimes. The plot looks like this:

My values are:
t = [161000, 161015...., 191115]
aw = [0.618,......, 0.532]
temperature = [23.7,....,24.4]
Is the problem that I am not starting from scratch in the t array?
If someone prompts or knows a problem, please help me.
Cheers max