# NumericSummary A summary of a numerical column. ``` struct NumericSummary where Element : BinaryFloatingPoint ``` ## Topics ### Creating a Summary [`init()`](/documentation/TabularData/NumericSummary/init()) Creates an empty numeric summary with default values. [`init(someCount: Int, noneCount: Int, mean: Element, standardDeviation: Element, min: Element, max: Element, median: Element, firstQuartile: Element, thirdQuartile: Element)`](/documentation/TabularData/NumericSummary/init(someCount:noneCount:mean:standardDeviation:min:max:median:firstQuartile:thirdQuartile:)) Creates an empty numeric summary. ### Comparing Summaries ### Inspecting a Summary [`var debugDescription: String`](/documentation/TabularData/NumericSummary/debugDescription) A text representation of the summary’s statistics suitable for debugging. [`var someCount: Int`](/documentation/TabularData/NumericSummary/someCount) The number of non-missing elements in the column. [`var noneCount: Int`](/documentation/TabularData/NumericSummary/noneCount) The number of missing elements in the column. [`var totalCount: Int`](/documentation/TabularData/NumericSummary/totalCount) The total number of elements in the column. ### Getting Statistical Values [`var max: Element`](/documentation/TabularData/NumericSummary/max) The largest value, excluding missing elements. [`var mean: Element`](/documentation/TabularData/NumericSummary/mean) The arithmetic mean of a column’s values that excludes missing elements. [`var median: Element`](/documentation/TabularData/NumericSummary/median) The midpoint value that’s above half of the non-missing elements’ values and below the other half’s values. [`var min: Element`](/documentation/TabularData/NumericSummary/min) The smallest value, excluding missing elements. [`var standardDeviation: Element`](/documentation/TabularData/NumericSummary/standardDeviation) The standard deviation of a column’s values that excludes missing elements. [`var firstQuartile: Element`](/documentation/TabularData/NumericSummary/firstQuartile) The value that’s above 25% of the non-missing elements’ values. [`var thirdQuartile: Element`](/documentation/TabularData/NumericSummary/thirdQuartile) The value that’s above 75% of the non-missing elements’ values. ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) [`Hashable`](/documentation/Swift/Hashable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) [`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible) --- 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)