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plyr (version 1.0.1)

Tools for splitting, applying and combining data

Description

plyr is a set of tools that solves a common set of problems: you need to break a big problem down into manageable pieces, operate on each pieces and then put all the pieces back together. For example, you might want to fit a model to each spatial location or time point in your study, summarise data by panels or collapse high-dimensional arrays to simpler summary statistics.

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Version

Install

install.packages('plyr')

Monthly Downloads

462,768

Version

1.0.1

License

MIT

Maintainer

Hadley Wickham

Last Published

July 6th, 2010

Functions in plyr (1.0.1)

Fail with specified value.

Order a data frame by its colums.

Split array, apply function, and return results in an array.

Number of dimensions.

Dimension names.

as.data.frame.idf

Convert immutable df to regular data frame.

Extract single column from immutable data frame.

Split list, apply function, and return results in an array.

Immutable df subsetting...

Split array, apply function, and return results in a data frame.

Split data frame, apply function, and return results in a data frame.

Split list, apply function, and discard results.

Numeric id for a vector.

`Splat' arguments to a function.

Split list, apply function, and return results in a list.

A unique numeric id for each unique row in a data frame.

Descending order.

Split data frame, apply function, and return results in a list.

Text progress bar.

Function that always returns true.

Split array, apply function, and discard results.

An indexed array.

create_progress_bar

Create progress bar.

Reduce dimensions.

Experimental iterator based version of llply.

Convert input to quoted variables.

Generate labels for split data frame.

Combine data...

Number of unique values.

Print quoted variables.

Determine if a vector is discrete.

Quote variables.

Construct an immutable data frame.

Graphical progress bar, powered by Tk.

Check if a data frame is empty.

Split array, apply function, and return results in a list.

Try, with default in case of error.

Replicate expression and return results in a array.

Summarise a data frame.

Apply with built in try.

list_to_dataframe

List to data frame.

Replicate expression and discard results.

Immutable df dimensions.

Aggregate multiple functions into a single function.

Call function with arguments in array or data frame, returning an array.

Call function with arguments in array or data frame, returning a list.

Split an array by...

Split data frame, apply function, and discard results.

Call function with arguments in array or data frame, returning a data frame.

Graphical progress bar, powered by Windows.

Replicate expression and return results in a data frame.

Quick data frame.

Call function with arguments in array or data frame, discarding results.

List to vector.

Null progress bar...

Count the number of occurences.

Immutable df names.

Compute names of quoted variables.

Add margins to a data frame.

Column-wise function.

Convert split list to regular list.

Split list, apply function, and return results in a data frame.

as.data.frame.function

Make a function return a data frame.

rbind.fill.matrix

Bind matrices by row, and fill missing columns with NA.

Split iterator that returns values, not indices.

Join two data frames together.

An indexed data frame.

Evaluate a quoted list of variables.

Split data frame, apply function, and return results in an array.

Figure out margining variables.

Replicate expression and return results in a list.

Split a data frame by variables.

Baseball batting

Yearly batting records for all major league baseball players

Ozone measurements

Monthly ozone measurements over Central America