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4.2 Overview of RDBMSs

December 6, 2010
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Print PDF 4.2 Overview of RDBMSs Traditionally there have been large (and expensive) commercial RDBMSs (Informix; Oracle; Sybase; IBM’s DB/2; Microsoft SQL Server on Windows) and academic and small-system databases (such as MySQL, PostgreSQL, Microso...

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4 Relational databases 4.1 Why use a database?

December 6, 2010
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Print PDF 4 Relational databases 4.1 Why use a database? There are limitations on the types of data that R handles well. Since all data being manipulated by R are resident in memory, and several copies of the data can be created during execution of a f...

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3.2 Octave

December 6, 2010
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Print PDF 3.2 Octave Octave is a numerical linear algebra system (http://www.octave.org), and function read.octave in package foreign can read in files in Octave text data format created using the Octave command save -ascii, with support for most of th...

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3.1 EpiInfo, Minitab, S-PLUS, SAS, SPSS, Stata, Systat

December 6, 2010
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Print PDF 3.1 EpiInfo, Minitab, S-PLUS, SAS, SPSS, Stata, Systat The recommended package foreign provides import facilities for files produced by these statistical systems, and for export to Stata. In some cases these function may require substantially...

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3 Importing from other statistical systems

December 6, 2010
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Print PDF 3 Importing from other statistical systems In this chapter we consider the problem of reading a binary data file written by another statistical system. This is often best avoided, but may be unavoidable if the originating system is not availa...

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2.6 Flat contingency tables

December 6, 2010
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Print PDF 2.6 Flat contingency tables 다차원의 수렴된 표를 표현하기 위해서 배열의 형태는 오히려 불편합니다. 범주형 데이터 분석의 경우 그러한 정보는 종종 셀의 수에 따라 factor의 수준 조합을

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Доктор Хаус и “ящик с усами”

Доктор Хаус и “ящик с усами”

В этой статье мы продолжим беседу о коробчатых диаграммах, а если конкретнее – то речь пойдет о построении коробчатой диаграммы с помощью R. В качестве исходных данных использованы рейтинги эпизодов 6 сезонов сериала “Доктор Хаус” с IMDb.com.(...) Прочитать на блоге всю заметку Доктор Хаус и “ящик с усами” (еще 351 слов)

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2.5 Re-shaping data

November 23, 2010
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Print PDF 2.5 Re-shaping data 때때로 스프레드시트 형태의 데이터는 목적에 따른 모든 관측치들에 의해 그 각각의 목적에 따른 공변량을 부여하는 단순한 포맷으로 되어 있습니다. R의 모델링 함수

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