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• plyr source: R/ldply.r - R Package Documentation
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• dlply function - RDocumentation
• R: laply and ldply from plyr package - Analytics4All
• r - Rename .id column in ldply - Stack Overflow

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plyr is a set of tools for a common set of problems: you need to split up a big data structure into homogeneous pieces, apply a function to each piece and then combine all the results back together. For example, you might want to:

plyr source: R/ldply.r - R Package Documentation

Introduction The base R system provides lapply() and related functions, and the package plyr provides alternatives that are worth considering. It will be assumed that readers are familiar with lapply() and are willing to spend a few moments reading the plyr documentation, to see why the illustration here will use the ldply() function. The test task will be extraction of latitude (and then both ...

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dlply function - RDocumentation

plyr. plyr is a set of tools for a common set of problems: you need to split up a big data structure into homogeneous pieces, apply a function to each piece and then combine all the results back together. For example, you might want to: fit the same model each patient subsets of a data frame. quickly calculate summary statistics for each group.

R: laply and ldply from plyr package - Analytics4All

Introduction. The base R system provides lapply() and related functions, and the package plyr provides alternatives that are worth considering. It will be assumed that readers are familiar with lapply() and are willing to spend a few moments reading the plyr documentation, to see why the illustration here will use the ldply() function.. The test task will be extraction of latitude (and then ...

r - Rename .id column in ldply - Stack Overflow

I am trying to apply the ldply function from the plyr package to convert lists to a data frame but I keep running into an error. I apply the following line: final <- plyr::ldply(data, data.frame) Which returns this error: Error: Error in (function (..., row.names = NULL, check.rows = FALSE, check.names = TRUE, :