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plyr (version 1.8.3)

Tools for Splitting, Applying and Combining Data

Description

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 piece 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. The development of 'plyr' has been generously supported by 'Becton Dickinson'.

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Install

install.packages('plyr')

Monthly Downloads

345,998

Version

1.8.3

License

MIT + file LICENSE

Issues

Pull Requests

Stars

Forks

Repository

https://github.com/hadley/plyr

Homepage

http://had.co.nz/plyr

Maintainer

Hadley Wickham

Last Published

June 12th, 2015

Functions in plyr (1.8.3)

Evaluate a quoted list of variables.

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

Split array, apply function, and discard results.

Split iterator that returns values, not indices.

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

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

Replicate expression and return results in a data frame.

create_progress_bar

Create progress bar.

Aggregate multiple functions into a single function.

Replace specified values with new values, in a factor or character vector.

Replicate expression and discard results.

Fail with specified value.

Combine data.frames by row, filling in missing columns.

Join two data frames together.

Vector aggregate.

An indexed array.

plyr: the split-apply-combine paradigm for R.

Mutate a data frame by adding new or replacing existing columns.

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

Check if a data frame is empty.

Determine if a vector is discrete.

Capture current evaluation context.

Graphical progress bar, powered by Tk.

Split an array by .margins.

Remove splitting variables from a data frame.

Monthly ozone measurements over Central America.

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

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

Number of dimensions.

Summarise a data frame.

Count the number of occurences.

Replicate expression and return results in a array.

Yearly batting records for all major league baseball players

plyr-deprecated

Deprecated Functions in Package plyr

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

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

Toggle row names between explicit and implicit.

Replace specified values with new values, in a vector or factor.

Column-wise function.

list_to_dataframe

List to data frame.

Order a data frame by its colums.

Convert input to quoted variables.

Compute names of quoted variables.

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

Quick data frame.

Descending order.

Split data frame, apply function, and discard results.

Split a data frame by variables.

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

Try, with default in case of error.

Reduce dimensions.

Function that always returns true.

Number of unique values.

Quote variables to create a list of unevaluated expressions for later evaluation.

Text progress bar.

Apply with built in try. Uses compact, lapply and tryNULL

Generate labels for split data frame.

Take a subset along an arbitrary dimension

rbind.fill.matrix

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

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

Dimension names.

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

Modify names by name, not position.

An indexed data frame.

Text progress bar with time.

Split list, apply function, and discard results.

as.data.frame.function

Make a function return a data frame.

Extract matching rows of a data frame.

`Splat' arguments to a function.

Recursively join a list of data frames.

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

Replicate expression and return results in a list.

Print quoted variables.

Convert split list to regular list.

Join keys. Given two data frames, create a unique key for each row.

Is a formula? Checks if argument is a formula

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

Construct an immutable data frame.

Null progress bar

Numeric id for a vector.

Experimental iterator based version of llply.

Graphical progress bar, powered by Windows.

List to vector.

Round to multiple of any number.