利用Matplotlib绘制第一张图

1.环境搭建

pip install matplotlib

2.

import  matplotlib.pyplot as plt
import numpy as np
plt.figure(figsize=(8,8),dpi=80)
a1=plt.subplot(2,2,1)
a2=plt.subplot(2,2,4)
x=np.linspace(-np.pi,np.pi, 360,endpoint=True)
c,s=np.cos(x),np.sin(x)
plt.sca(a1)

plt.plot(x,s,label="$ sin(x) $",color="red",linewidth=2,line)
plt.sca(a2)
plt.plot(x,c,label="$ cos(x) $",color="green",linewidth=2,line)
plt.title("Matplotlib练习")
plt.xlabel("times")
plt.ylabel("Values")
plt.xlim(-4.0,4.0)
plt.xticks(np.linspace(-4.0,4.0,9,endpoint=True))
plt.ylim(-1.0,1.0)
plt.yticks(np.linspace(-1.0,1.0,5,endpoint=True))
plt.legend()
plt.show()

3.效果展示

 4.注意事项

第一次运用可能会报错Traceback (most recent call last): File "D:/JetBrains/test/eeg_test/test.py", line 52, in import matplotlib.pyplot as plt File "D:JetBrainspyEnvpython363libsite-packagesmatplotlibpyplot.py", line 115, in _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup() File "D:JetBrainspyEnvpython363libsite-packagesmatplotlibbackends__init__.py", line 62, in pylab_setup [backend_name], 0) File "D:JetBrainsPyCharm 2017.3helperspycharm_matplotlib_backendbackend_interagg.py", line 17, in verbose = matplotlib.verbose AttributeError: module 'matplotlib' has no attribute 'verbose'，

解决：1.在pycharm中打开" File --> Settings --> Tools --> Python Scientific ",将"Show plots in toolwindow"去掉勾选，并应用