Python Bokeh – 在图形上绘制光线

Bokeh 是一个Python交互式数据可视化。它使用 HTML 和 JavaScript 渲染其绘图。它针对现代 Web 浏览器进行演示，提供具有高性能交互性的新颖图形的优雅、简洁构造。

Bokeh 可用于在图形上绘制光线。可以使用plotting模块的ray()方法在图形上绘制光线。

plotting.figure.ray()

Syntax : ray(parameters)

Parameters :

x : x-coordinates of the starting points of the rays
y : y-coordinates of the starting points of the rays
length : length of the ray
length_units : unit of the length of the rays

Returns : an object of class GlyphRenderer

编程需要懂一点英语

示例 1：在此示例中，我们将使用默认值来绘制图形。

# importing the modules
from bokeh.plotting import figure, output_file, show
        
# file to save the model
output_file("gfg.html")
        
# instantiating the figure object
graph = figure(title = "Bokeh Rays Graph")
      
# the points to be plotted
x = 0
y = 0
  
# plotting the graph
graph.ray(x, y)
      
# displaying the model
show(graph)

输出：

示例 2：在此示例中，我们将绘制具有各种其他参数的多条光线。

# importing the modules
from bokeh.plotting import figure, output_file, show
from bokeh.palettes import magma
import numpy
  
# file to save the model
output_file("gfg.html")
        
# instantiating the figure object
graph = figure(title = "Bokeh Rays Graph")
  
# name of the x-axis 
graph.xaxis.axis_label = "x-axis"
       
# name of the y-axis 
graph.yaxis.axis_label = "y-axis"
      
# the points to be plotted
x = [0] * 256
y = [0] * 256
  
# angles of the rays
angle = numpy.linspace(0.00, 6.28, num = 256).tolist()
  
# color of the rays
color = magma(256)
  
# plotting the graph
graph.ray(x, y,
          angle = angle,
          color = color)
      
# displaying the model
show(graph)

输出：

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