# AnyCategoricalSummary A type-erased categorical summary. ``` struct AnyCategoricalSummary ``` ## Overview Categorical summary includes 5 statistics: - someCount: The number of non-missing elements. - noneCount: The number of missing elements. - totalCount: The sum of missing and non-missing elements. - uniqueCount: The number of unique elements. - mode: The most common elements. ## Topics ### Creating a categorical summary [`init(CategoricalSummary)`](/documentation/TabularData/AnyCategoricalSummary/init(_:)-7p9bv) Creates a type-erased categorical summary from a typed categorical summary. [`init(CategoricalSummary)`](/documentation/TabularData/AnyCategoricalSummary/init(_:)-8innt) Creates a type-erased categorical summary from a typed categorical summary. ### Getting statistical information [`var noneCount: Int`](/documentation/TabularData/AnyCategoricalSummary/noneCount) The number of missing elements in the column. [`var someCount: Int`](/documentation/TabularData/AnyCategoricalSummary/someCount) The number of non-missing elements in the column. [`var totalCount: Int`](/documentation/TabularData/AnyCategoricalSummary/totalCount) The total number of elements in the column. [`var uniqueCount: Int`](/documentation/TabularData/AnyCategoricalSummary/uniqueCount) The number of unique elements. ### Getting mode information [`var mode: [Any]`](/documentation/TabularData/AnyCategoricalSummary/mode) The most common values in a column. [`var modeType: any Any.Type`](/documentation/TabularData/AnyCategoricalSummary/modeType) The underlying type of [`mode`](/documentation/TabularData/AnyCategoricalSummary/mode). ### Comparing summaries [`static func == (AnyCategoricalSummary, AnyCategoricalSummary) -> Bool`](/documentation/TabularData/AnyCategoricalSummary/==(_:_:)) Returns a Boolean value that indicates whether the categorical summaries are equal. ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)