PyTorch is an open-source machine learning library developed by Facebook. It is used for deep neural network and natural language processing purposes. The function torch.sin() provides support for the sine function in PyTorch. It expects the input in radian form and the output is in the range [-1, 1]. The input type is tensor and if the input contains more than one element, element-wise sine is computed.

Syntax: torch.sin(x, out=None) Parameters: x: Input tensor name (optional): Output tensor Return type: A tensor with the same type as that of x.

Code #1:

# Importing the PyTorch library
import torch

# A constant tensor of size 6
a = torch.FloatTensor([1.0, -0.5, 3.4, -2.1, 0.0, -6.5])
print(a)

# Applying the sin function and
# storing the result in 'b'
b = torch.sin(a)
print(b)

Output:

 1.0000
-0.5000
 3.4000
-2.1000
 0.0000
-6.5000
[torch.FloatTensor of size 6]


 0.8415
-0.4794
-0.2555
-0.8632
 0.0000
-0.2151
[torch.FloatTensor of size 6]

  Code #2: Visualization

# Importing the PyTorch library
import torch

# Importing the NumPy library
import numpy as np

# Importing the matplotlib.pyplot function
import matplotlib.pyplot as plt

# A vector of size 15 with values from -5 to 5
a = np.linspace(-5, 5, 15)

# Applying the sine function and
# storing the result in 'b'
b = torch.sin(torch.FloatTensor(a))

print(b)

# Plotting
plt.plot(a, b.numpy(), color = 'red', marker = "o") 
plt.title("torch.sin") 
plt.xlabel("X") 
plt.ylabel("Y") 

plt.show()

Output:

 0.9589
 0.9103
 0.4167
-0.2806
-0.8408
-0.9899
-0.6551
 0.0000
 0.6551
 0.9899
 0.8408
 0.2806
-0.4167
-0.9103
-0.9589
[torch.FloatTensor of size 15]