R: Identifying rows in a matrix or data.frame

row.match {prodlim} | R Documentation

## Identifying rows in a matrix or data.frame

### Description

Function for finding matching rows between two matrices or data.frames. First the matrices or data.frames are vectorized by row wise pasting together the elements. Then it uses the function match. Thus the function returns a vector with the row numbers of (first) matches of its first argument in its second.

### Usage

    row.match(x, table, nomatch = NA)

### Arguments

`x` | Vector or matrix whose rows are to be matched
`table` | Matrix or data.frame that contain the rows to be matched against.
`nomatch` | the value to be returned in the case when no match is found. Note that it is coerced to 'integer'.

### Value

A vector of the same length as 'x'.

### Author(s)

Thomas A. Gerds

### See Also

`match`

### Examples

    tab <- data.frame(num=1:26,abc=letters)
    x <- c(3,"c")
    row.match(x,tab)
    x <- data.frame(n=c(3,8),z=c("c","h"))
    row.match(x,tab)

[Package prodlim version 2018.04.18 Index]