# Python | Sine Curve Filling Example

In this article, we are going to learn how to fill the area between two sin/cos/trigonometric curves in x-y plot using matplotlib in Python?
Submitted by Anuj Singh, on August 28, 2020

Illustrations:   ## Python code for sine curve filling example

```import numpy as np
import matplotlib.pyplot as plt

# Example 1
# Definiing Curves
x = np.arange(40)
y = np.sin(x)
yy = 4 + np.sin(x + 0.2)

# Filling Area
plt.figure(figsize=(8,4))
plt.fill_between(x, y, yy, alpha=0.6)
plt.plot(x,y, linewidth=2.0, color='blue', alpha=0.6)
plt.plot(x,yy, linewidth=2.0, color='blue', alpha=0.6)
plt.title('Sine curve Filling Example')

# Example 2
# Definiing Curves
x = np.arange(40)
y = np.sin(x)*np.exp(-x**0.05)
yy = 4 + np.sin(x + 0.9)*np.exp(-x**0.05)
y4 = 2 + np.sin(x + 0.9)*np.exp(-x**0.05)
y5 = 3 + np.sin(x + 0.9)*np.exp(-x**0.05)

# Filling Area
plt.figure(figsize=(8,4))
plt.fill_between(x, y, yy, alpha=0.6)
plt.fill_between(x, y4, y5, alpha=0.6)
plt.title('Sine curve Filling Example')

# Example 3
# Definiing Curves
x = np.arange(40)
y = 2*np.sin(x)*np.exp(-x**0.05)
yy = 4 + 2*np.sin(x + 0.9)*np.exp(-x**0.05)
y4 = 2 + 2*np.sin(x + 0.9)*np.exp(-x**0.05)
y5 = 3 + 2*np.sin(x + 0.9)*np.exp(-x**0.05)

# Filling Area
plt.figure(figsize=(8,4))
plt.fill_between(x, y, yy, color='green', alpha=0.3)
plt.fill_between(x, y4, y5, alpha=0.6)
plt.title('Sine curve Filling Example')
```

Output:

```Output is as Figure
```

Languages: » C » C++ » C++ STL » Java » Data Structure » C#.Net » Android » Kotlin » SQL
Web Technologies: » PHP » Python » JavaScript » CSS » Ajax » Node.js » Web programming/HTML
Solved programs: » C » C++ » DS » Java » C#
Aptitude que. & ans.: » C » C++ » Java » DBMS
Interview que. & ans.: » C » Embedded C » Java » SEO » HR
CS Subjects: » CS Basics » O.S. » Networks » DBMS » Embedded Systems » Cloud Computing
» Machine learning » CS Organizations » Linux » DOS
More: » Articles » Puzzles » News/Updates