Problem when drawing plots with matplotlib

Hello,

I have my interface which contained 4 tabs. In every tab, I have a button called generate graph which generates graph when it is clicked. I can plot the first figure but when I try to plot the second, the interface crashes and no plot is represented. I used the library matplotlib to do that. Here is my code :

fig = plt.figure(self.numFiguresPlot2_1)
fig.canvas.set_window_title(self.DropDownListDisplaySector2_1.currentText())
 x = np.arange(0, self.stockParam.nTotZones, 1);
y = pd.to_numeric(matrix4["Price"])
print("Moyenne = ")
print(y.mean(0))
z = pd.to_numeric(matrix4["Adjust"]*y)/100 + y
 if(firstPlot):
price = plt.plot(x, y, label = ("Price"))
 shadowPrice = plt.plot(x, z, label = ("Price + adjust for iteration "+self.DropDownListDisplayIter2_1.currentText()))
plt.legend()
plt.draw()
plt.show()

Can you help me ?
Thanks.

Eeli K

@EJWA I see nothing Qt related in your question, did you post to the right forum?

Oh yes, it is a problem with matplotlib. I must search for another forum.