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ASUM[x]

computes the sum of the absolute values of elements of the vector x.

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

ASUM

ASUM[x]

computes the sum of the absolute values of elements of the vector x.

更多信息和选项

  • To use ASUM, you first need to load the BLAS Package using Needs["LinearAlgebra`BLAS`"].
  • The following argument must be given:
  • xinput expressionvector
  • For complex vectors x, ASUM computes the total of the sum of the absolute values of the real and imaginary parts taken separately.

范例

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基本范例  (1)

Load the BLAS package:

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

Compute the sum of absolute values of elements of an integer vector:

Wolfram Language code: ASUM[{1, -2, 3, -4}]

Scope  (4)

A real vector:

Wolfram Language code: ASUM[{-2.1, 3.2, 4.3, -5.9}]

A complex vector:

Wolfram Language code: ASUM[{1 + I, -2 - I, -3 + 2I, 1 - 4 * I}]

An arbitrary-precision vector:

Wolfram Language code: ASUM[{1`20, -2, 3, -4}]

A symbolic vector:

Wolfram Language code: ASUM[{v1, v2, v3}]

Properties & Relations  (2)

ASUM[x] is equivalent to Apply[Plus,Abs[x]] for non-complex x:

Wolfram Language code: x = RandomReal[{-1, 1}, {5}]; ASUM[x] == Apply[Plus, Abs[x]]

ASUM[x] is equivalent to Apply[Plus,Abs[Re[x]]]+Apply[Plus,Abs[Im[x]]] for complex or symbolic x:

Wolfram Language code: x = RandomComplex[{-1 - I, 1 + I}, {5}]; ASUM[x] == Apply[Plus, Abs[Re[x]]] + Apply[Plus, Abs[Im[x]]]
Wolfram Research (2017)，ASUM，Wolfram 语言函数，https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/ASUM.html.

文本

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

CMS

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

APA

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

BibTeX

@misc{reference.wolfram_2026_asum, author="Wolfram Research", title="{ASUM}", year="2017", howpublished="\url{https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/ASUM.html}", note=[Accessed: 15-August-2026]}

BibLaTeX

@online{reference.wolfram_2026_asum, organization={Wolfram Research}, title={ASUM}, year={2017}, url={https://reference.wolfram.com/language/LowLevelLinearAlgebra/ref/ASUM.html}, note=[Accessed: 15-August-2026]}