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Sparkline
A sparkline is a very small line chart, typically drawn without axes or coordinates. It presents the general shape of the variation (typically over time) in some measurement, such as temperature or stock market price, in a simple and highly condensed way. Sparklines are small enough to be embedded in text, or several sparklines may be grouped together as elements of a small multiple.
Whereas the typical chart is designed to show as much data as possible, and is set off from the flow of text, sparklines are intended to be succinct, memorable, and located where they are discussed.
== History ==
The earliest known implementation of sparklines, called "inline charts," was by interface designer Peter Zelchenko, who designed it for the PC trading platform Medved QuoteTracker, in early 1998. The term ''sparkline'' was introduced by Edward Tufte for "small, high resolution graphics embedded in a context of words, numbers, images". Tufte describes sparklines as "data-intense, design-simple, word-sized graphics".
On May 7, 2008, Microsoft employees filed a patent application for the implementation of sparklines in Microsoft Excel 2010. The application was published on November 12, 2009,〔(【引用サイトリンク】title=Sparklines in the grid )〕 prompting Tufte〔(【引用サイトリンク】title=Sparklines in Excel )〕 to express concern at the broad claims and lack of novelty of the patent.〔(【引用サイトリンク】title=Microsoft makes patent claim for Sparklines )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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