collapse: Collapse a data frame

In jsks/seqR: Ordinal Sequence Analysis

Description

Collapse unchanging consecutive observations for a given data frame.

Usage

collapse(data, include_na = FALSE)

Arguments

data	A data.frame. Data to collapse
include_na	Boolean. Whether to collapse consecutive NAs.

Details

If the given data frame contains multiple columns, then an observation is only collapsed if all of the columns are unchanging.

     Row and column names will be preserved; however, other
     user defined attributes will be dropped.

Value

A data.frame of row size: 0 < N <= nrow(data).

Warning

collapse currently only works with REALSXP, INTSXP, STRSXP, LGLSXP objects. This covers all of the common atomic R data types, including more complex types like Date. Unfortunately however, this means that collapse will return an error if a column has a class of raw. Bummer.

Examples

x <- data.frame(x = c(1, 1, 1), y = c(1, 2, 2))
collapse(x)

y <- data.frame(x = c(1, 1, 1), y = c("a", "a", "b"), stringsAsFactors = FALSE)
collapse(y)

jsks/seqR documentation built on May 9, 2019, 12:48 p.m.