使用matplotlib生成平滑折線圖

Question

以下是使用matplotlib生成圖的python腳本。

#!/usr/bin/python 

import matplotlib.pyplot as plt 
import time 
import numpy as np 
from scipy.interpolate import spline 

# Local variables 
x = [] 
y = [] 

# Open the data file for reading lines 
datafile = open('testdata1.txt', 'r') 
sepfile = datafile.read().split('\n') 
datafile.close() 

# Create a canvas to place the subgraphs 
canvas = plt.figure() 
rect = canvas.patch 
rect.set_facecolor('white') 

# Iterate through the lines and parse them 
for datapair in sepfile: 
    if datapair: 
     xypair = datapair.split(' ') 
     x.append(int(xypair[1])) 
     y.append(int(xypair[3])) 

# Define the matrix of 1x1 to place subplots 
# Placing the plot1 on 1x1 matrix, at pos 1 
sp1 = canvas.add_subplot(1,1,1, axisbg='w') 
sp1.plot(x, y, 'red', linewidth=2) 

# Colorcode the tick tabs 
sp1.tick_params(axis='x', colors='red') 
sp1.tick_params(axis='y', colors='red') 

# Colorcode the spine of the graph 
sp1.spines['bottom'].set_color('r') 
sp1.spines['top'].set_color('r') 
sp1.spines['left'].set_color('r') 
sp1.spines['right'].set_color('r') 

# Put the title and labels 
sp1.set_title('matplotlib example 1', color='red') 
sp1.set_xlabel('matplot x label', color='red') 
sp1.set_ylabel('matplot y label', color='red') 

# Show the plot/image 
plt.tight_layout() 
plt.grid(alpha=0.8) 
plt.savefig("example6.eps") 
plt.show() 

它生成的情節一樣

我試圖生成SMOOTH圖，而不是線，但未能取得結果。我試圖按照這個視頻：https://www.youtube.com/watch?v=uSB8UBrbMfk

有人可以請建議我的變化？

Answer 1

我得到了這個工作！感謝您的評論。這是更新的代碼。

#!/usr/bin/python 

import matplotlib.pyplot as plt 
import time 
import numpy as np 
from scipy.interpolate import spline 

# Local variables 
x = [] 
y = [] 

# Open the data file for reading lines 
datafile = open('testdata1.txt', 'r') 
sepfile = datafile.read().split('\n') 
datafile.close() 

# Create a canvas to place the subgraphs 
canvas = plt.figure() 
rect = canvas.patch 
rect.set_facecolor('white') 

# Iterate through the lines and parse them 
for datapair in sepfile: 
    if datapair: 
     xypair = datapair.split(' ') 
     x.append(int(xypair[1])) 
     y.append(int(xypair[3])) 

x_sm = np.array(x) 
y_sm = np.array(y) 

x_smooth = np.linspace(x_sm.min(), x_sm.max(), 200) 
y_smooth = spline(x, y, x_smooth) 

# Define the matrix of 1x1 to place subplots 
# Placing the plot1 on 1x1 matrix, at pos 1 
sp1 = canvas.add_subplot(1,1,1, axisbg='w') 
#sp1.plot(x, y, 'red', linewidth=2) 
sp1.plot(x_smooth, y_smooth, 'red', linewidth=1) 

# Colorcode the tick tabs 
sp1.tick_params(axis='x', colors='red') 
sp1.tick_params(axis='y', colors='red') 

# Colorcode the spine of the graph 
sp1.spines['bottom'].set_color('r') 
sp1.spines['top'].set_color('r') 
sp1.spines['left'].set_color('r') 
sp1.spines['right'].set_color('r') 

# Put the title and labels 
sp1.set_title('matplotlib example 1', color='red') 
sp1.set_xlabel('matplot x label', color='red') 
sp1.set_ylabel('matplot y label', color='red') 

# Show the plot/image 
plt.tight_layout() 
plt.grid(alpha=0.8) 
plt.savefig("example6.eps") 
plt.show() 

新情節看起來像這樣。