python不会生成pdf文档

Question

昨天我切换到Linux，我想写一个小Python程序：

import matplotlib.pyplot as plt
import numpy as np
from scipy.optimize import curve_fit
linie, spannung = np.genfromtxt("werte.csv", delimiter=",", unpack = True)
d = (linie -1)*6
params, covariance_matrix = np.polyfit(d, spannung, deg = 1, cov = True)
errors = np.sqrt(np.diag(covariance_matrix))
print(params, errors)
plt.plot(d, spannung)
x = np.linspace(0,50,100)    
plt.plot(x,params[0]*x-params[1])
plt.show()

但不幸的是，我得到了错误：

UserWarning: Matplotlib is currently using pgf, which is a non-GUI backend, so cannot show the figure.

我是Ubuntu的新手，也是编程的新手，所以我不知道这意味着什么。

希望你能帮我：(

Answer 1

由于您在无头控制台上工作，因此使用plt.savefig((会收到此错误

import matplotlib.pyplot as plt
import numpy as np
from scipy.optimize import curve_fit
linie, spannung = np.genfromtxt("werte.csv", delimiter=",", unpack = True)
d = (linie -1)*6
params, covariance_matrix = np.polyfit(d, spannung, deg = 1, cov = True)
errors = np.sqrt(np.diag(covariance_matrix))
print(params, errors)
plt.plot(d, spannung)
x = np.linspace(0,50,100)    
plt.plot(x,params[0]*x-params[1])
plt.savefig('anyname.png')