Matplotlib: x-axis values instead of indices

Question

While plotting the sinus of x for x in [0,2*pi] and plotting it using matplotlib, I did this:

x = np.arange(0,2*np.pi,0.1)
y = np.sin(x)
plt.plot(y)
plt.show()

but the result was

where the x-axis does not display the value of x, but the index of x in the array. How can I tell matplotlib.pyplot to give me the actual x-values (0.1, 0.2, ... pi, pi +0.1, .... 2*pi) as one would expect from a function?

Arne · Accepted Answer · 2020-04-14 13:32:41Z

2

To be fair to matplotlib, you never told it anything about x. Try this:

plt.plot(x, y)

answered Apr 14, 2020 at 13:32

Arne

10.6k2 gold badges22 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

martin · Accepted Answer · 2020-04-14 13:36:58Z

0

You should replace y = np.sin(x) for y = [np.sin(i) for i in x].

answered Apr 14, 2020 at 13:36

martin

8857 silver badges25 bronze badges

2 Comments

Wouter Vandenputte Over a year ago

That would only change the value of y. The actual problem was that I plotted y without giving the x-values as proposed by @Arne

martin Over a year ago

Yeah, I saw that. Thought the mistake was another one

Collectives™ on Stack Overflow

Matplotlib: x-axis values instead of indices

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related