atomic vector
An object that contains only one form of data. The atomic modes are: ”logical”, ”numeric”, ”complex” and ”character”.
attach
The act of adding an item to the search list. You usually attach a package with the require function, you attach saved files and objects with the attach function.
data frame
A rectangular data object where each column may be a different type of data. Conceptually a generalization of a matrix, but implemented entirely differently.
factor
A data object that represents categorical data. It is possible (and often unfortunate) to confuse a factor with a character vector.
global environment
The first location on the search list, and the place where objects that you create reside.
list
A type of object with possibly multiple components where each component may be an arbitrary object, including a list.
matrix
A rectangular data object where all cells have the same data type. Conceptually a specialization of a data frame, but implemented entirely differently.
package
A collection of R objects in a special format that includes help files and such. Most packages primarily or exclusively contain functions, but some packages exclusively contain datasets.
search list
The collection of locations that R searches for objects when it is evaluating a command.
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jun 25, 26
I’d like to do a song of great social and political import. The code that created the illustrations in Tao Te Programming is now available as the TaoTeProgramming package on [...]
jun 25, 26
Another of the all ye entering here. Issue When subscripting an xts object, columns that don’t exist in the object are silently ignored. Example First, create an xts object: xtx [...]
jun 25, 26
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