plotting in a loop

Community matplotlib-users
1

Thank you very much Steve! This helped a lot, it worked in the ipython as well, there is no difference, only that the ipython is interactive and has more supplementary features. :slight_smile:

Thanks,

Tomislav

···

tomislav_maric@…2537…

Hello everyone,

if I read a column file like this (simplified to integers):

0 1 2 3
1 2 3 4
2 3 4 5
3 4 5 6

with: “data = np.loadtxt(“fileName”)”, why can’t I use a for loop inside ipython (started with “-pylab” option) to plot each of the Line2D objects and then draw them on the plot? I am using matplotlib to debug a computational geometry code and I would like these lines to plot paused by the user input so that I can identify when (where) exactly the wrong calculations happen:

import numpy as np

import matplotlib.pyplot as plt

fig1 = plt.figure()

ax1 = fig1.add_subplot(111)

ax1.set_aspect(“equal”)

for line in data:

raw_input(“press enter to plot the line”)

ax1.plot([line[0],line[2]],[line[1],line[3]],‘b’)

plt.draw()

This way I could see with pressing e.g. the return key when my calculations go wrong… any advice?

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