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DOT[x,y]

computes the dot product of two vectors x and y.

詳細とオプション
Details and Options Details and Options
例題  
例  
Scope  
Properties & Relations  
Possible Issues  
関連するガイド
引用書式
LinearAlgebra`BLAS`
LinearAlgebra`BLAS`

DOT

DOT[x,y]

computes the dot product of two vectors x and y.

詳細とオプション

  • 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.

例題

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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言語関数， https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html.

テキスト

Wolfram Research (2017), DOT, Wolfram言語関数， https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html.

CMS

Wolfram Language. 2017. "DOT." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html.

APA

Wolfram Language. (2017). DOT. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/DOT.html

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: 11-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: 11-August-2026]}