WOLFRAM

Wolfram 语言与系统参考资料中心

DOT[x,y]

computes the dot product of two vectors x and y.

更多信息和选项
Details and Options Details and Options
范例  
基本范例  
Scope  
Properties & Relations  
Possible Issues  
相关指南
按以下格式引用：
LinearAlgebra`BLAS`
LinearAlgebra`BLAS`

DOT

DOT[x,y]

computes the dot product of two vectors x and y.

更多信息和选项

  • To use DOT, you first need to load the BLAS Package using Needs["LinearAlgebra`BLAS`"].
  • The following arguments must be given:
  • xinput expressionvector
    yinput expressionvector
  • The vector arguments must be of the same length.

范例

打开所有单元 关闭所有单元

基本范例  (1)

Load the BLAS package:

Wolfram Language code: Needs["LinearAlgebra`BLAS`"]

Compute the dot product of two vectors:

Wolfram Language code: DOT[{1, 2, 3}, {-1, 2, 1}]

Scope  (4)

Real vectors:

Wolfram Language code: DOT[{2.1, 3.4, 5.1}, {4.2, -2.3, -0.8}]

Complex vectors:

Wolfram Language code: DOT[{2. + I, -3. - 2 I, 4}, {-I, 2. - I, 3.}]

Arbitrary-precision vectors:

Wolfram Language code: DOT[{1`20, 2, 3}, {-1`20, 2, 1}]

Symbolic vectors:

Wolfram Language code: DOT[{a, b, c}, {d, e, f}]

Properties & Relations  (1)

For vectors x and y, DOT[x,y] is equivalent to x.y:

Wolfram Language code: x = RandomReal[1, {5}]; y = RandomReal[1, {5}]; DOT[x, y] == x.y

Possible Issues  (1)

Arguments must be of the same length:

Wolfram Language code: DOT[{1, 2}, {1, 2, 3}]
Wolfram Research (2017)，DOT，Wolfram 语言函数，https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html.

文本

Wolfram Research (2017)，DOT，Wolfram 语言函数，https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html.

CMS

Wolfram 语言. 2017. "DOT." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html.

APA

Wolfram 语言. (2017). DOT. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html 年

BibTeX

@misc{reference.wolfram_2026_dot, author="Wolfram Research", title="{DOT}", year="2017", howpublished="\url{https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html}", note=[Accessed: 15-August-2026]}

BibLaTeX

@online{reference.wolfram_2026_dot, organization={Wolfram Research}, title={DOT}, year={2017}, url={https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html}, note=[Accessed: 15-August-2026]}