渐变散点图绘制-优快云博客

本文介绍如何使用Python和matplotlib库生成渐变散点图，通过随机行走算法创建点坐标，并利用颜色映射展示点的变化过程。

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根据有限制的随机指定点数画出渐变散点图

---Python语言实现

---matplotlib第三方库

random_walk.py

from random import choice

class RandomWalk():
	"""docstring for RandomWalk"""
	def __init__(self,num_points=10000):
		self.num_points = num_points
		self.x_values = [0]
		self.y_values = [0]

	def fill_walk(self):
		while len(self.x_values) < self.num_points:
			x_direction = choice([1,-1])
			x_distance = choice(list(range(5)))
			x_step = x_direction*x_distance

			y_direction = choice([1,-1])
			y_distance = choice(list(range(5)))
			y_step = y_direction*y_distance

			if x_step == 0 and y_step == 0:
				continue

			next_x = self.x_values[-1]+x_step
			next_y = self.y_values[-1]+y_step

			self.x_values.append(next_x)
			self.y_values.append(next_y)

rw_visiual.py

import matplotlib.pyplot as plt
from random_walk import RandomWalk

# while True:
rw = RandomWalk(50000)
rw.fill_walk()
point_numbers = list(range(rw.num_points))
plt.figure(figsize=(23,12))
plt.scatter(rw.x_values,rw.y_values,s=10,c=point_numbers,cmap=plt.cm.winter,edgecolor='none')
plt.scatter(0,0,s=20,c='red',edgecolor='none')
plt.scatter(rw.x_values[-1],rw.y_values[-1],s=20,c='red',edgecolor='none')
plt.axes().get_xaxis().set_visible(False)
plt.axes().get_yaxis().set_visible(False)
plt.show()

随机漫步——散点图