Matplotlib Tutorial #4: Plot With Default X-Points

You actually don't have to pass x-points as an argument in the plot method. If the value of x-points is a sequential increment starting from 0 for example 1, 2, 3, .. and you just don't care about the values, you just need to only pass the y-points.

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Default X-Points

Let's say that you want to plot the following points: (0, 1), (1, 5), (2, 10), (3, 8), (4, 11). You can do that by typing the following code

import matplotlib.pyplot as plt
import numpy as np

xpoints = np.array([0, 1, 2, 3, 4])
ypoints = np.array([1, 5, 10, 8, 11])

plt.plot(xpoints, ypoints)
plt.show()

Which produces the following output

But notice that xpoints values are a sequential of 1 through 5 with the increment of 1 each step. In this case, you actually don't have to pass xpoints, therefore the code will look like this

import matplotlib.pyplot as plt
import numpy as np

ypoints = np.array([1, 5, 10, 8, 11])

plt.plot(ypoints)
plt.show()

The output will be the same as the previous code output

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There you go, that is how you can create a plot by only passing the y-points. Thank you for reading this article and have a great day!