eval.plyr: Evaluate a list of expressions by group

Description Usage Arguments Value

Description

Evaluates qoted variables by group in a data frame. Based on eval.quoted.

Usage

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  eval.plyr(exprs, data = NULL, by = NULL, enclos = NULL,
    try = FALSE)

Arguments

exprs

a list of expressions

data

a data frame

by

a vector of character strings that specify variable names in data. data will be split into groups based on the unique combinations of the values of these variables within the data frame. exprs will be evaluated separately for each group.

enclos

an environment

Value

a data frame formed by combining the results of evaluating exprs in each group of data


garrettgman/ggplyr documentation built on May 16, 2019, 5:38 p.m.