Python | PyTorch atan()方法
原文:https://www.geeksforgeeks.org/python-pytorch-atan-method/
PyTorch 是脸书开发的开源机器学习库。它用于深度神经网络和自然语言处理。 函数 torch.atan()支持 PyTorch 中的反正切函数。它以弧度形式给出输出。输入类型是张量,如果输入包含多个元素,则计算元素方向的反正切。
语法 : torch.atan(x,out=None) 参数 : x :输入张量 名称(可选):输出张量 返回类型:与 x 类型相同的张量。
代码#1:
蟒蛇 3
# Importing the PyTorch library
import torch
# A constant tensor of size 6
a = torch.FloatTensor([1.0, -0.5, 3.4, 0.2, 0.0, -2])
print(a)
# Applying the inverse tan function and
# storing the result in 'b'
b = torch.atan(a)
print(b)
输出:
tensor([ 1.0000, -0.5000, 3.4000, 0.2000, 0.0000, -2.0000])
tensor([ 0.7854, -0.4636, 1.2847, 0.1974, 0.0000, -1.1071])
代码#2: 可视化
蟒蛇 3
# 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 inverse tangent function and
# storing the result in 'b'
b = torch.atan(torch.FloatTensor(a))
print(b)
# Plotting
plt.plot(a, b.numpy(), color = 'red', marker = "o")
plt.title("torch.atan")
plt.xlabel("X")
plt.ylabel("Y")
plt.show()
输出:
tensor([-1.3734, -1.3416, -1.2978, -1.2341, -1.1342, -0.9601, -0.6202, 0.0000,
0.6202, 0.9601, 1.1342, 1.2341, 1.2978, 1.3416, 1.3734])