How to draw a line chart using python

Today I will teach you how to draw some linear patterns using python. Friends in need can refer to it.

Draw the simplest straight line graph

The code is as follows:

import numpy as np
import matplotlib.pyplot as plt
  
x=[0,1]
y=[0,1]
plt.figure()
plt.plot(x,y)
plt.savefig("easyplot.jpg")

##The result is as follows:

Code explanation:

#x轴，y轴
x=[0,1]
y=[0,1]
#创建绘图对象
plt.figure()
#在当前绘图对象进行绘图（两个参数是x,y轴的数据）
plt.plot(x,y)
#保存图象
plt.savefig("easyplot.jpg")

2. Add a label to the picture and the title

does not correspond to the picture above The X, Y axis label description and title

Based on the above code, you can add these contents

The code is as follows:

   
import numpy as np
import matplotlib.pyplot as plt
  
x=[0,1]
y=[0,1]
  
plt.figure()
plt.plot(x,y)
plt.xlabel("time(s)")
plt.ylabel("value(m)")
plt.title("A simple plot")

The results are as follows:

Code explanation:

   
plt.xlabel("time(s)") #X轴标签
plt.ylabel("value(m)") #Y轴标签
plt.title("A simple plot") #标题

3. Draw sinx curve

The code is as follows:

# -*- coding: utf-8 -*-
import numpy as np
import matplotlib.pyplot as plt

#Set the values ​​of x and y axes (y=sinx)

x = np.linspace(0, 10, 1000)
y = np.sin(x)

#Create a drawing object, the figsize parameter can specify the width and height of the drawing object, the unit is inches, one inch = 80px

plt.figure(figsize=(8,4))

#Draw in the current drawing object (x-axis, y-axis, for all Name of the drawn curve, line color, line width)

plt.plot(x,y,label="$sin(x)$",color="red",linewidth=2)

#X-axis text

plt.xlabel("Time(s)")

#Y-axis text

plt.ylabel("Volt")

#Chart title

plt.title("PyPlot First Example")

#Range of Y-axis

plt.ylim(-1.2,1.2)

#Display diagram

plt.legend()

#Display diagram

plt.show()

#Save diagram

plt.savefig("sinx.jpg")

The results are as follows:

4. Draw a line chart

The code is as follows:

 
# -*- coding: utf-8 -*-
import numpy as np
import matplotlib.pyplot as plt
#X轴，Y轴数据
x = [0,1,2,3,4,5,6]
y = [0.3,0.4,2,5,3,4.5,4]
plt.figure(figsize=(8,4)) #创建绘图对象
plt.plot(x,y,"b--",linewidth=1)  #在当前绘图对象绘图（X轴，Y轴，蓝色虚线，线宽度）
plt.xlabel("Time(s)") #X轴标签
plt.ylabel("Volt") #Y轴标签
plt.title("Line plot") #图标题
plt.show() #显示图
plt.savefig("line.jpg") #保存图

I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!

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