Custom Legend with Matplotlib

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

# Create Plot
fig, ax = plt.subplots()
ax.plot(x, y1, label='Sine Wave')
ax.plot(x, y2, label='Cosine Wave')
ax.legend()
plt.show()

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

fig, ax = plt.subplots()
ax.plot(x, y1, label='Sine Wave')
ax.plot(x, y2, label='Cosine Wave')
ax.legend(loc='upper right')  # Change legend position
plt.show()

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

fig, ax = plt.subplots()
ax.plot(x, y1, label='Sine Wave')
ax.plot(x, y2, label='Cosine Wave')

legend = ax.legend(loc='upper right')
legend.set_title('Waves')  # Set legend title

plt.show()

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

fig, ax = plt.subplots()
ax.plot(x, y1, label='Sine Wave')
ax.plot(x, y2, label='Cosine Wave')

ax.legend(loc='upper right', fontsize='large', title='Waves', title_fontsize='medium')
plt.show()

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

fig, ax = plt.subplots()
line1, = ax.plot(x, y1, label='Sine Wave')
line2, = ax.plot(x, y2, label='Cosine Wave')

# Custom legend handles and labels
ax.legend(handles=[line1], labels=['Only Sine'])
plt.show()

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

fig, ax = plt.subplots()
ax.plot(x, y1, label='Sine Wave', color='blue')
ax.plot(x, y2, label='Cosine Wave', color='green')

# Customizing legend colors
legend = ax.legend()
for text, line in zip(legend.get_texts(), legend.get_lines()):
    text.set_color(line.get_color())

plt.show()

import matplotlib.pyplot as plt
import numpy as np

# Sample Data
x = np.linspace(0, 10, 100)
y1 = np.sin(x)
y2 = np.cos(x)

fig, ax = plt.subplots()
ax.plot(x, y1, label='Sine Wave')
ax.plot(x, y2, label='Cosine Wave')

# Place legend outside of the plot
ax.legend(loc='center left', bbox_to_anchor=(1, 0.5))

plt.show()