idata.frame
(Package: plyr) :
Construct an immutable data frame.
An immutable data frame works like an ordinary data frame, except that when you subset it, it returns a reference to the original data frame, not a a copy. This makes subsetting substantially faster and has a big impact when you are working with large datasets with many groups.
● Data Source:
CranContrib
● Keywords: manip
● Alias: idata.frame
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splitter_a
(Package: plyr) :
Split an array by .margins.
Split a 2d or higher data structure into lower-d pieces based
● Data Source:
CranContrib
● Keywords: internal
● Alias: splitter_a
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isplit2
(Package: plyr) :
Split iterator that returns values, not indices.
Split iterator that returns values, not indices.
● Data Source:
CranContrib
● Keywords: internal
● Alias: isplit2
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rdply
(Package: plyr) :
Replicate expression and return results in a data frame.
Evaluate expression n times then combine results into a data frame
● Data Source:
CranContrib
● Keywords: manip
● Alias: rdply
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.
(Package: plyr) :
Quote variables to create a list of unevaluated expressions for later
This function is similar to ~ in that it is used to capture the name of variables, not their current value. This is used throughout plyr to specify the names of variables (or more complicated expressions).
● Data Source:
CranContrib
● Keywords:
● Alias: ., is.quoted, quoted
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laply
(Package: plyr) :
Split list, apply function, and return results in an array.
For each element of a list, apply function then combine results into an array.
● Data Source:
CranContrib
● Keywords: manip
● Alias: laply
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l_ply
(Package: plyr) :
Split list, apply function, and discard results.
For each element of a list, apply function and discard results
● Data Source:
CranContrib
● Keywords: manip
● Alias: l_ply
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vaggregate
(Package: plyr) :
Vector aggregate.
This function is somewhat similar to tapply , but is designed for use in conjunction with id . It is simpler in that it only accepts a single grouping vector (use id if you have more) and uses vapply internally, using the .default value as the template.
● Data Source:
CranContrib
● Keywords:
● Alias: vaggregate
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defaults
(Package: plyr) :
Set defaults.
Convient method for combining a list of values with their defaults.
● Data Source:
CranContrib
● Keywords: manip
● Alias: defaults
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Reduce/simplify a list of homogenous objects to an array
● Data Source:
CranContrib
● Keywords: internal
● Alias: list_to_array
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