Python实现读取txt文件并画三维图简单代码示例

Z时代
2024-01-10
分类：综合

记忆力差的孩子得勤做笔记！

刚接触python，最近又需要画一个三维图，然后就找了一大堆资料，看的人头昏脑胀的，今天终于解决了！好了，废话不多说，直接上代码！

#由三个一维坐标画三维散点


#coding:utf-8 
import numpy as np 
import matplotlib.pyplot as plt 
from mpl_toolkits.mplot3d.axes3d import Axes3D 
x = [] 
y = [] 
z = [] 
f = open("data\\record.txt") 
line = f.readline() 
while line: 
  c,d,e = line.split() 
  x.append(c) 
  y.append(d) 
  z.append(e) 
  line = f.readline()   
f.close() 
#string型转int型 
x = [ int( x ) for x in x if x ] 
y = [ int( y ) for y in y if y ] 
z = [ int( z ) for z in z if z ] 
print x 
fig=plt.figure() 
ax=Axes3D(fig) 
ax.scatter3D(x, y, z) 
ax.set_xlabel('x') 
ax.set_ylabel('y') 
ax.set_zlabel('z') 
plt.show()

最关键的步骤就是那个string类型转int类型，之前缺了这一步，死活的报错，好了，终于搞定！

#画三维线


#
coding: utf - 8
from mpl_toolkits.mplot3d
import axes3d
import matplotlib.pyplot as plt
x = []
y = []
z = []
f = open("data\\record.txt")
line = f.readline()
while line:
  c, d, e = line.split()
x.append(c)
y.append(d)
z.append(e)
line = f.readline()
f.close()
# string型转int型
x = [int(x) for x in x
  if x
]
y = [int(y) for y in y
  if y
]
z = [int(z) for z in z
  if z
]
# print x
fig = plt.figure()
ax = fig.gca(projection = '3d')
ax.plot(x, y, z)
ax.set_xlabel('x')
ax.set_ylabel('y')
ax.set_zlabel('z')
plt.show()