Python data visualization-scatter chart and python data visualization

Source: Internet
Author: User

Python data visualization-scatter chart and python data visualization

PS: I flipped through the draft box and found that I saved an article in last February... Although naive, send it...


This article records data visualization in python-scatter Plot scatter,

Make x as data (50 points, 30 dimensions each), we only visualize the first two dimensions. Labels is its category (assume there are three categories ).

Here, "x" uses random to analyze specific data.

Label is set to []-> 1, []-> 2, [36: 50]-> 3, (array connection method in python: Convert to list first, +, and then returns to array)

Use matplotlib's scatter to draw a scatter chart. legend and matlab are slightly different. For details, see the code.



x = rand(50,30)
from numpy import *
import matplotlib
import matplotlib.pyplot as plt

#basic
f1 = plt.figure(1)
plt.subplot(211)
plt.scatter(x[:,1],x[:,0])

# with label
plt.subplot(212)
label = list(ones(20))+list(2*ones(15))+list(3*ones(15))
label = array(label)
plt.scatter(x[:,1],x[:,0],15.0*label,15.0*label)

# with legend
f2 = plt.figure(2)
idx_1 = find(label==1)
p1 = plt.scatter(x[idx_1,1], x[idx_1,0], marker = 'x', color = 'm', label='1', s = 30)
idx_2 = find(label==2)
p2 = plt.scatter(x[idx_2,1], x[idx_2,0], marker = '+', color = 'c', label='2', s = 50)
idx_3 = find(label==3)
p3 = plt.scatter(x[idx_3,1], x[idx_3,0], marker = 'o', color = 'r', label='3', s = 15)
plt.legend(loc = 'upper right')



Result:

Figure (1 ):


Figure (2 ):







Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.