📜  TensorFlow tf.sub()函数

📅  最后修改于: 2022-05-13 01:56:22.052000             🧑  作者: Mango

TensorFlow tf.sub()函数

tf.sub()函数返回两个 tf.Tensor 对象元素的减法。 tf.Tensor 对象表示数字的多维数组。

句法:

tf.sub( a, b )

参数:

  • a:它包含第一个 tf.Tensor 对象。该参数的值可以是 tf.TensorTypedArray|Array。
  • b:它包含从第一个 tf.Tensor 对象中减去的第二个 tf.Tensor 对象。该参数的值可以是 (tf.Tensor|TypedArray|Array)。该参数的类型与a的类型相同。

返回值:此函数返回 tf.Tensor 对象。

示例 1:

Javascript
// Importing the tensorflow.js library 
import * as tf from "@tensorflow/tfjs"
  
// Declare the Tensor array
const arr1 = tf.tensor1d([10, 20, 30, 40, 50]);
const arr2 = tf.tensor1d([5, 10, 15, 20, 25]);
  
// Use sub() function to subtract
// two Tensor objects
arr1.sub(arr2).print();


Javascript
// Importing the tensorflow.js library 
import * as tf from "@tensorflow/tfjs"
  
// Declare the Tensor array
const arr1 = tf.tensor1d([30, 40, 50]);
const arr2 = tf.tensor1d([5, 10, 15, 20, 25]);
  
// Use sub() function to subtract
// two Tensor objects
arr1.sub(arr2).print();


Javascript
// Importing the tensorflow.js library 
import * as tf from "@tensorflow/tfjs"
  
// Declare the Tensor array
const arr = tf.tensor1d([15, 10, 25, 20, 35]);
  
// Declare a number
const num = tf.scalar(30);
  
// Use sub() function to subtract number
// from Tensor object
arr.sub(num).print();


输出:

Tensor
    [5, 10, 15, 20, 25]

示例 2:

Javascript

// Importing the tensorflow.js library 
import * as tf from "@tensorflow/tfjs"
  
// Declare the Tensor array
const arr1 = tf.tensor1d([30, 40, 50]);
const arr2 = tf.tensor1d([5, 10, 15, 20, 25]);
  
// Use sub() function to subtract
// two Tensor objects
arr1.sub(arr2).print();

输出:

An error occured on line: 7
Operands could not be broadcast together with shapes 3 and 5.

示例 3:

Javascript

// Importing the tensorflow.js library 
import * as tf from "@tensorflow/tfjs"
  
// Declare the Tensor array
const arr = tf.tensor1d([15, 10, 25, 20, 35]);
  
// Declare a number
const num = tf.scalar(30);
  
// Use sub() function to subtract number
// from Tensor object
arr.sub(num).print();

输出:

Tensor
    [-15, -20, -5, -10, 5]

参考: https://js.tensorflow.org/api/latest/#sub