Counts

可用

Returns an association mapping each element to its number of occurrences.

形式

Counts[list]

Counts[list, elems]

验证过的示例Counts[{a, b, a, c, b, a}] → <|a -> 3, b -> 2, c -> 1|>Counts[<|a -> 1, b -> 1, c -> 2|>] → <|1 -> 2, 2 -> 1|>

在 Qurak 上运行搜索参考

主题

Associations - Functions That Create Associations
Computation With Structured Datasets - Selections and Transformations
Computation With Structured Datasets - Creating Associations
Database Like Operations On Datasets - General
Handling Arrays Of Data - Structural Array Analysis »
Linguistic Data - Textual Analysis »

相关

CountsBy Tally BinCounts Merge GroupBy Count Gather Commonest DuplicateFreeQ KeySort Sort CharacterCounts

全部 6300 个函数 · 从 MCP 客户端使用