CODEWITHSUNDEEP
pythonmatplotlibplot
PythonRunner
PythonRunner

Reputation: 1671

How to show labels on matplotlib plots

When I execute the following code, it doesn't produce a plot with a label.

import matplotlib.pyplot as plt
import numpy as np
x = np.arange(1, 5)
plt.plot(x, x*1.5, label='Normal')

Numpy version is '1.6.2' Matplotlib version is '1.3.x'

Why is this happening?

Upvotes: 52

Views: 86301

Answers (3)

nithin vm
nithin vm

Reputation: 1

to add label

plt.xlabel('insert your label')

plt.ylabel('insert your label')

plt.title('insert title')

Upvotes: 0

cottontail
cottontail

Reputation: 23131

If you want to show the labels next to the lines, there's a matplotlib extension package matplotx (can be installed via pip install matplotx[all]) that has a method that does that.

import matplotx

x = np.arange(1, 5)
plt.plot(x, x*1.5, label='Normal')
plt.plot(x, x*2, label='Quadratic')
matplotx.line_labels()

img

N.B. A similar task using only matplotlib would look like:

x = np.arange(1, 5)
y = x*1.5
plt.plot(x, y)
plt.text(x[-1]*1.05, y[-1], 'Normal', color=plt.gca().get_lines()[0].get_color());

Upvotes: 2

mechanical_meat
mechanical_meat

Reputation: 169304

You forgot to display the legend:

...
plt.legend(loc='best')
plt.show()

enter image description here

Upvotes: 138

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