How to make Animated plot with Matplotlib and Python - Very Easy !!!

How to make animated plot (animated chart) with Matplotlib and Python programming Language. In this tutorial, an animated plot is used for visualizing the data in a CSV file!

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[bfuzmsi]

This is what i need, you saved me months of research

[lucasbazemore]

This was exactly what I was looking for and needed!

[shreyasp]

here is a better version of it


import pandas as pd

import matplotlib.pyplot as plt

from matplotlib.animation import FuncAnimation

import numpy as np

from itertools import count

import sys




spreadsheet - Sheet1.csv")
x=[]
y=[]

fig, ax=plt.subplots()
ax.plot(x, y)

counter=count(0, 1)

# Get the shape of the DataFrame
n_rows, n_cols = df.shape




def update(i):
idx=next(counter)
try:
x.append(df.iloc[idx, 0])
y.append(df.iloc[idx, 1])
except IndexError:
print("Index out of range!")
sys.exit(1)
plt.cla()
ax.plot(x, y)


ani=FuncAnimation(fig=fig, func=update, interval=200)
plt.show()

[somynt]

Thanks bro, great job, you made it look simple. Keep up the good work.

[bennguyen]

I've heard pyqtgraph is good on 2d performance, but it couldn't keep up with the real-time data from a sensor. Appending a new sample every 100ms and redrawing worked for a few minutes, but it got progressively slower and was nowhere near real-time.

I'm hoping to change my luck with matplotlib.. any suggestions how to plot such that the display keeps up with the data? For example, appending a new sample to a csv file, and having matplotlib read the file seems like a bad idea. What other way can matplotlib work with a dynamically increasing large data array ?

Should I look into a different tool like gnuplot, vaex, or mayavi?

[amindhahri]

I have tried it anf i have some issues with it it is not drawing a line what can I do

[hanzo]

I have a plot with 5000 points and log scale. How do I prevent it from giving so many axis tick names? The scales become unreadable