在 Python 中绘制图形

Plot graph in Python

将 numpy 导入为 np

导入 pandas 作为 pd

将 matplotlib.pyplot 导入为 plt

'''

K=1

Rmv = 26

SigS = 111.7

M = 2.050

N = 2

SigD = (-249.4)

def Mittelspannung():

result = [] 

Z = []

SigM = []

for i in range(1,31):
    output = 1 - pow((((i-1)*1/14.5)-1),2)
    result.append(output)
    #print(output)   

for value in range(0,15):
    C4 = (Rmv) - (result[value]) * (Rmv)
    Z.append(C4)
    print(C4)    

for value in range(15,30):                
    B11 = (SigD) - (result[value]) * (SigD)
    Z.append(B11)
    print(B11) 
      
for x in range(0,30):    
    SigMean = ((SigS**M * (1-(Z[x] + SigS)**N/(Rmv + SigS)**N))**(1/M)) / K
    SigM.append(SigMean) 
return SigM

打印(Mittelspannung())

'''

我正在尝试绘制 'Z' 和 'SigM' 之间的图表。我收到一个错误。谁能帮忙画一下图。

您应该创建一个列表 Z,您将在其中附加每次迭代计算的 Z 值,如下所示:

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt

K = 1
Rmv = 26
SigS = 111.7
M = 2.050
N = 2
SigD = (-249.4)

def Mittelspannung():
    result = [] 
    Y = []
    SigM = []
    Z = []

    for i in range(1,31):
        output = 1 - pow((((i-1)*1/14.5)-1),2)
        Z.append(Rmv - (output*Rmv))
        result.append(output)
    
    for value in range(0,15):
        C4 = (Rmv) - (result[value]) * (Rmv)
        Y.append(C4)   

    for value in range(15,30):                
        B11 = (SigD) - (result[value]) * (SigD)
        Y.append(B11)
          
    for x in range(0,30):    
        SigMean = ((SigS**M * (1-(Z[x] + SigS)**N/(Rmv + SigS)**N))**(1/M)) / K
        SigM.append(SigMean) 
    return Z, SigM


Z, SigM = Mittelspannung()
plt.figure()
plt.plot(Z, SigM)

您没有在函数调用中定义 Z。根据您使用的工具,您应该能够在错误消息中看到类似“Z is being used before initializing”之类的内容。

Z, SigM = Mittelspannung()
plt.figure()
plt.plot(Z, SigM)

此代码将向您显示错误

#error

----> 1 Z, SigM = Mittelspannung()
      2 plt.figure()
      3 plt.plot(Z, SigM)

ValueError: too many values to unpack (expected 2)

// 试试这个

SigM = Mittelspannung()
plt.figure()
plt.plot(SigM)