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6.4 Listing and manipulating connections

December 6, 2010
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Print PDF 6.4 Listing and manipulating connections User에 의해 현재 열려있는 모든 connection의 개요는 showConnections( )로 알아낼 수 있고, 닫혀 있는 connection과 terminal connection 등을 포함한 모든 connection의 개

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6.3 Input from connections

December 6, 2010
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Print PDF 6.3 Input from connections connection으로부터 읽는 기본적 함수는 scan과 readLines입니다. 이것들은 문자열(character string) 인수(argument)를 취하고 함수의 지속을 위해 파일 connection을 엽니다. 그러

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6.2 Output to connections

December 6, 2010
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Print PDF 6.2 Output to connections 지금까지 파일에 쓰기(writing)의 방법으로 함수 cat, write, write.table 그리고 sink, 파일에 붙여넣기(appending)의 방법으로 인수(argument) append=TRUE에 대하여 설명하였습니다....

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4.3 R interface packages

December 6, 2010
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Print PDF 4.3 R interface packages There are several packages available on CRAN to help R communicate with DBMSs. They provide different levels of abstraction. Some provide means to copy whole data frames to and from databases. All have functions to se...

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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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