python用for循环画多个图形_在同一轴上绘制for循环内生成的多个绘图python

让我改进一下你的代码：import numpy as np

import matplotlib.pyplot as plt

# set the font size globally to get the ticklabels big too:

plt.rcParams["font.size"] = 16

# use numpy to read in the names

names = np.genfromtxt("selected.csv", delimiter=" ", dtype=np.str, skiprows=1)

# not necessary butyou might want to add options to the figure

plt.figure()

# don't use a for i in range loop to loop over array elements

for name in names:

# use the format function

filename = '/home/mh/Masters_Project/Sigma/{}.dat'.format(name)

# use genfromtxt because of better error handling (missing numbers, etc)

average, sigma = np.genfromtxt(filename, usecols = (0,1), unpack = True, delimiter = ' ')

plt.xlabel('Magnitude(average)')

plt.ylabel('$\sigma$')

plt.plot(average, sigma, marker = '+', linestyle = '', label = name)

plt.legend(loc = 'best')

plt.show()