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SequenceCount[list,sub]

给出 sub 作为 list 的子列表，在 list 中出现的次数.

SequenceCount[list,patt]

给出和一般序列模式 patt 匹配的子列表在 list 中出现的次数.

更多信息和选项
Details and Options Details and Options
范例  
基本范例  
范围  
选项  
Overlaps  
属性和关系  
参见
相关指南
历史
按以下格式引用：

SequenceCount

SequenceCount[list,sub]

给出 sub 作为 list 的子列表，在 list 中出现的次数.

SequenceCount[list,patt]

给出和一般序列模式 patt 匹配的子列表在 list 中出现的次数.

更多信息和选项

  • 在 SequenceCount[list,patt] 中，patt 可以是一个表达式，其头 List 含有诸如 PatternSequence、Repeated (..)、Blank (_) 和 BlankSequence (__) 这样的模式构造.
  • patt 也可以是和一个列表匹配的模式，然而其自身没有头 List.
  • 缺省设置 OverlapsFalse 时，SequenceCount 只计入不重叠的子列表. 而设置为 OverlapsTrue 时，计入重叠的子列表.
  • 设置为 OverlapsAll 时，计入和模式匹配的所有子列表. 设置为 OverlapsTrue 时，只计入在给定位置出现的第一个匹配的子列表.

范例

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基本范例  (2)

计算子列表出现的次数：

Wolfram Language code: SequenceCount[{a, b, a, b, a, b}, {a, b}]

计算一个模式序列出现的次数：

Wolfram Language code: SequenceCount[{1, 2, a, b, 3, c, d, 4, 5, 6, e, f, g, 7}, {__Symbol}]

范围  (4)

计算列表中整数序列出现的次数：

Wolfram Language code: SeedRandom[1]; list = RandomChoice[Range[10], 10 ^ 7]; SequenceCount[list, Range[6]]

给出它们在列表中的位置：

Wolfram Language code: SequencePosition[list, Range[6]]

计算列表中一个单词序列出现的次数：

Wolfram Language code: words = ExampleData[{"Text", "OriginOfSpecies"}, "Words"];
Wolfram Language code: SequenceCount[words, {"groups", "of", "species"}]

计算和模式匹配的序列出现的次数：

Wolfram Language code: SequenceCount[Range[1000], {_ ? PrimeQ, _, _ ? PrimeQ}]

计算长度为6的所有重叠序列出现的次数：

Wolfram Language code: SequenceCount[Range[10], list_ /; Length[list] == 6, Overlaps -> True]

可能出现的序列：

Wolfram Language code: SequenceCases[Range[10], list_ /; Length[list] == 6, Overlaps -> True]

选项  (2)

Overlaps  (2)

允许重叠：

Wolfram Language code: SequenceCount[{a, b, a, b, a, b, a, b}, {a, b, a, b}, Overlaps -> True]

不允许重叠：

Wolfram Language code: SequenceCount[{a, b, a, b, a, b, a, b}, {a, b, a, b}, Overlaps -> False]

允许开始位置不同的重叠：

Wolfram Language code: SequenceCount[{a, b, c, d}, {__}, Overlaps -> True]

不允许重叠：

Wolfram Language code: SequenceCount[{a, b, c, d}, {__}, Overlaps -> False]

允许计入所有的重叠：

Wolfram Language code: SequenceCount[{a, b, c, d}, {__}, Overlaps -> All]

属性和关系  (3)

计算序列出现的次数：

Wolfram Language code: SequenceCount[{a, b, 1, 2, c, d, 3, 4}, {__Symbol}, Overlaps -> False]

给出序列出现的位置：

Wolfram Language code: SequencePosition[{a, b, 1, 2, c, d, 3, 4}, {__Symbol}, Overlaps -> False]

给出序列：

Wolfram Language code: SequenceCases[{a, b, 1, 2, c, d, 3, 4}, {__Symbol}, Overlaps -> False]

用表达式替代序列：

Wolfram Language code: SequenceReplace[{a, b, 1, 2, c, d, 3, 4}, {__Symbol} -> "X"]

对于字符列表，SequenceCount 的功能类似于 StringCount：

Wolfram Language code: text = "For lists of characters SequenceCount is very similar to StringCount:";
Wolfram Language code: SequenceCount[Characters[text], Characters["Count"]]
Wolfram Language code: StringCount[text, "Count"]

SubsetCount 统计序列中以任意顺序排列的元素：

Wolfram Language code: SubsetCount[{1, a, 2, 3, a, b, c}, {a, _Integer}]
Wolfram Language code: SubsetCases[{1, a, 2, 3, a, b, c}, {a, _Integer}]

SequenceCount 只统计以指定顺序出现的序列：

Wolfram Language code: SequenceCount[{1, a, 2, 3, a, b, c}, {a, _Integer}]
Wolfram Language code: SequenceCases[{1, a, 2, 3, a, b, c}, {a, _Integer}]
Wolfram Research (2015)，SequenceCount，Wolfram 语言函数，https://reference.wolfram.com/language/ref/SequenceCount.html.

文本

Wolfram Research (2015)，SequenceCount，Wolfram 语言函数，https://reference.wolfram.com/language/ref/SequenceCount.html.

CMS

Wolfram 语言. 2015. "SequenceCount." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/SequenceCount.html.

APA

Wolfram 语言. (2015). SequenceCount. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/SequenceCount.html 年

BibTeX

@misc{reference.wolfram_2026_sequencecount, author="Wolfram Research", title="{SequenceCount}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/SequenceCount.html}", note=[Accessed: 01-November-2026]}

BibLaTeX

@online{reference.wolfram_2026_sequencecount, organization={Wolfram Research}, title={SequenceCount}, year={2015}, url={https://reference.wolfram.com/language/ref/SequenceCount.html}, note=[Accessed: 01-November-2026]}