Circular heatmap python

from pylab import *
import numpy as np
from scipy.interpolate import griddata

#create 5000 Random points distributed within the circle radius 100
max_r = 100
max_theta = 2.0 * np.pi
number_points = 5000
points = np.random.rand(number_points,2)*[max_r,max_theta]

#Some function to generate values for these points, 
#this could be values = np.random.rand(number_points)
values = points[:,0] * np.sin(points[:,1])* np.cos(points[:,1])

#now we create a grid of values, interpolated from our random sample above
theta = np.linspace(0.0, max_theta, 100)
r = np.linspace(0, max_r, 200)
grid_r, grid_theta = np.meshgrid(r, theta)
data = griddata(points, values, (grid_r, grid_theta), method='cubic',fill_value=0)

#Create a polar projection
ax1 = plt.subplot(projection="polar")
ax1.pcolormesh(theta,r,data.T)
plt.show()

Source: stackoverflow.com

Similar codes

0 vote110 views1 answer
Django database connection isn't set to UTC postgresql
Python
27 votes159 views3 answers
Python get the key with the max or min value in a dictionary
Python
5 votes122 views2 answers
Beautifulsoup find by class
Python
-1 vote119 views2 answers
Matplotlib set colorbar range
Python
-1 vote160 views2 answers
Python timestamp to yyyy-mm-dd
Python
1 vote122 views1 answer
How to make a pythoon turtle follow another?
Python
0 vote127 views3 answers
Add a new button in the index of the page wagtail
Python
0 vote120 views1 answer
Pyplot width
Python
0 vote145 views1 answer
Flask No application found. Either work inside a view function or push an application context
Python Flask
1 vote130 views2 answers
Get env variable linux python
Python