cbind.smart: A smarter cbind

In drmjc/mjcbase: General helper functions for dealing with \R objects/data types

Description

cbind only combines matrix-like objects when they contain identical rownames. This function allows any number of matrix-like objects to be cbound, even if they contain very few (or even no) rownames in common. The result will have 1 row per unique rowname across all the input matrix-like-objects, and will have NA's inserted where appropriate. The first argument will be in the top left of the result, followed by all columns of the 2nd argument, and any new rows added to the bottom, until the final obect is added in the bottom right hand corner. Thus the result grows diagonally.

Usage

cbind.smart(..., sort.col = NULL)

Arguments

sort.col	Column to sort on. “NULL” is ok.
...	at least two matrix-like objects to be merged.

Value

a data.frame with all input objects cbound together, and with 1 row per unique rowname across all the input matrix-like-objects, with NA's inserted where appropriate.

Author(s)

Mark Cowley, 2010-03-10

See Also

rbind.smart, cbind

Examples

a <- data.frame(matrix(rnorm(25), 5, 5))
dimnames(a) <- list(letters[1:5], LETTERS[1:5])
b <- data.frame(matrix(rnorm(25), 5, 5))
dimnames(b) <- list(letters[3:7], LETTERS[3:7])
c <- data.frame(matrix(rnorm(25), 5, 5))
dimnames(c) <- list(letters[11:15], LETTERS[11:15])
cbind.smart(a, b, c)

drmjc/mjcbase documentation built on May 15, 2019, 2:27 p.m.