matplotlib Plot does not appear

Question

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

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

ODiogoSilva · Accepted Answer · 2017-03-04 01:30:23Z

4

You're missing plt.show() at the end.

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

or, if you want to save it into a file

plt.savefig("my_file.png")

answered Mar 4, 2017 at 1:30

ODiogoSilva

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1 Comment

user3848207 Over a year ago

Thanks. I will mark it as the answer. cannot upvote due to lack of points.

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