cumddply: Cumulative ddply

In cumplyr: Extends ddply to allow calculation of cumulative quantities.

Description

Cumulative ddply

Usage

cumddply(data, equality.variables, inequality.variables, func)

Arguments

data	Data to process
equality.variables	Character vector variables used to split data on equality
inequality.variables	Character vector variables used to split data on inequality
func	Function to call on each split of the data

Value

Data frame with cumulative results combined across splits

Examples

library('cumplyr')

data(rt.data)

results <- cumddply(rt.data,
                    c('Subject', 'Block'),
                    c('Trial'),
                    function (df) {with(df, mean(RT))})

print(results)

Example output

   Subject Block Trial func(local.data)
1        1     1     1        0.5000000
2        1     1     2        0.7500000
3        1     1     3        1.0000000
4        1     2     1        0.5000000
5        1     2     2        0.5000000
6        1     2     3        0.5833333
7        2     1     1        1.0000000
8        2     1     2        1.5000000
9        2     1     3        2.0000000
10       2     2     1        0.5000000
11       2     2     2        0.7500000
12       2     2     3        1.1666667

cumplyr documentation built on May 2, 2019, 2:13 p.m.