matplotlib图不出现 [英] matplotlib Plot does not appear

问题描述

我正在将python v3.6与pycharm和anaconda一起使用.我试图运行下面的代码来绘制一个简单的正弦波.

I am using python v3.6 with pycharm and anaconda. I tried to run the code below to plot a simple sine wave;

import numpy as np
import matplotlib.pyplot as plt

# Generate a sequence of numbers from -10 to 10 with 100 steps in between
x = np.linspace(-10, 10, 100)
# Create a second array using sine
y = np.sin(x)
# The plot function makes a line chart of one array against another
plt.plot(x, y, marker="x")
pass

代码运行平稳，没有错误，但未显示任何图.如何显示情节?

The code runs smoothly without error but no plot appears. How do I get the plot to appear?

推荐答案

您最后缺少plt.show().

import numpy as np
import matplotlib.pyplot as plt

# Generate a sequence of numbers from -10 to 10 with 100 steps in between
x = np.linspace(-10, 10, 100)
# Create a second array using sine
y = np.sin(x)
# The plot function makes a line chart of one array against another
plt.plot(x, y, marker="x")
plt.show()
pass

或者，如果您要将其保存到文件中

or, if you want to save it into a file

plt.savefig("my_file.png")

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