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[4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and analogous to a Python dictionary mapping column names (keys) to Series (values), with each Series sharing an index. [4]: 115 DataFrames can be concatenated together or "merged" on columns or indices in a manner similar to joins in SQL.
Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})
For the decimal formats, the usual encoding of unsigned integers is used. If an operation has a single NaN input and propagates it to the output, the result NaN's payload should be that of the input NaN (this is not always possible for binary formats when the signaling/quiet state is encoded by an is_signaling flag, as explained above). If ...
R is a programming language for statistical computing and data visualization.It has been adopted in the fields of data mining, bioinformatics and data analysis. [9]The core R language is augmented by a large number of extension packages, containing reusable code, documentation, and sample data.
Chen Nan (Chinese: 陈楠; pinyin: Chén Nán; born January 8, 1983) is a Chinese basketball player. Chen was part of the Chinese teams that won gold medals at the 2002, 2006, and 2010 Asian Games. She competed at the 2004 Summer Olympics in Athens, the 2008 Summer Olympics in Beijing, and the 2012 Summer Olympics in London. [1] [2]
The Huainanzi is an ancient Chinese text made up of essays from scholarly debates held at the court of Liu An, Prince of Huainan, before 139 BCE.Compiled as a handbook for an enlightened sovereign and his court, the work attempts to define the conditions for a perfect socio-political order, derived mainly from a perfect ruler. [1]
In Morse code, it is known as a "commat", consisting of the Morse code for the "A" and "C" which run together as one character: . The symbol was added in 2004 for use with email addresses, [56] the only official change to Morse code since World War I. In Nepali, the symbol is called "at the rate." Commonly, people will give their email ...
Naan (English: Me) is a 2012 Indian Tamil-language crime thriller film written and directed by Jeeva Shankar in his directorial debut. Composer Vijay Antony plays the lead role of a psychopathic killer; he also produced the film and worked as the music director.