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The r-commands were developed in 1982 by the Computer Systems Research Group at the University of California, Berkeley, based on an early implementation of TCP/IP (the protocol stack of the Internet). [2] The CSRG incorporated the r-commands into their Unix operating system, the Berkeley Software Distribution (BSD). The r-commands premiered in ...
These extensions are designed to reduce the overhead of the user to kernel mode transition for the network data path and the notification path, but use the rest of the regular Windows TCP and UDP stack (and uses existing network cards). The setup path (for example, the "connect" function) is unchanged from the regular Winsock path.
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. R software is open-source and free software.
With features like Record Structure and subroutines it allows a user to get data from a database and manipulate it by storing it in a temporary structure; execute a particular section of the code, if required using a subroutine. Complete for CCL (Cerner Command Language) is provided by Cerner Corporation.
For example, to undo a delete selection command, the object may contain a copy of the deleted text so that it can be re-inserted, if the delete selection command must be undone. Note that using a separate object for each invocation of a command is also an example of the chain of responsibility pattern. The term execute is also ambiguous.
Starting with Windows 95, the Run command is accessible through the Start menu and also through the shortcut key ⊞ Win+R.Although the Run command is still present in Windows Vista and later, it no longer appears directly on the Start menu by default, in favor of the new search box and a shortcut to the Run command in the Windows System sub-menu.
Compared to libraries in other programming languages, R packages must conform to a relatively strict specification. [3] The Writing R Extensions manual [7] specifies a standard directory structure for R source code, data, documentation, and package metadata, which enables them to be installed and loaded using R's in-built package management ...
Some commands accept or require one or more additional arguments. Arguments are given after the command, and are separated from the command using a space. [11] For example, the command to set the trigger mode of an instrument to "normal" may be given as "TRIGger:MODe NORMal".