74 Legend in metplotlib plots

https://vlrtraining.com/courses/python-data-science-beginner-tutorial

In [2]:

import matplotlib.pyplot as plt
import numpy as np
x = np.linspace(0, 5, 11)
y = x ** 2 
%matplotlib inline

In [29]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, y,"r")
ax.plot(y, x,"g")
#ax.legend()

Out[29]:

[<matplotlib.lines.Line2D at 0xb9255c0>]

In [31]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, y,"g")
ax.plot(y, x,"r")
ax.legend()

No handles with labels found to put in legend.

Out[31]:

<matplotlib.legend.Legend at 0xa861128>

In [32]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, y,"g",label="x,y")
ax.plot(y, x,"r",label="y,x")
ax.legend()

Out[32]:

<matplotlib.legend.Legend at 0x8190ac8>

In [33]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, y,label="x,y")
ax.plot(y, x,label="y,x")
ax.legend(loc=4)

Out[33]:

<matplotlib.legend.Legend at 0xb95c358>

In [34]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, y,label="x,y")
ax.plot(y, x,label="y,x")
ax.legend(loc=5)

Out[34]:

<matplotlib.legend.Legend at 0xa7f8f60>

In [36]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, y,label="x,y")
ax.plot(y, x,label="y,x")
ax.legend(loc=(0.4,0.2))

Out[36]:

<matplotlib.legend.Legend at 0xba25550>

In [37]:

fig = plt.figure()

ax = fig.add_axes([0,0,1,1])

ax.plot(x, x**2, label="x**2")
ax.plot(x, x**3, label="x**3")
ax.legend()

Out[37]:

<matplotlib.legend.Legend at 0xba8f3c8>