# bivariate recode

### Description

Recode `x1`

and `x2`

per the lexical `codes`

table.

### Usage

1 | ```
recode2(x1, x2, codes)
``` |

### Arguments

`x1, x2` |
vectors of the same length assuming a discrete number of levels |

`codes` |
a 2-dimensional matrix indexed by the levels of |

### Details

1. If length(x1) != length(x2), complain.

2. if(is.logical(x1)) l1 <- c(FALSE, TRUE) else l1 <- unque(x1); ditto for x2.

3. If(missing(codes)) codes <- outer(unique(x1), unique(x2))

4. if(is.null(dim(codes))) dim(codes) <- c(length(unique(x1)), length(unique(x2)))

5. If is.null(rownames(codes)), set as follows: If nrow(codes) == length(unique(x1)), rownames(codes) <- unique(x1). Else, if nrow(codes) = max(x1), set rownames(codes) <- seq(1, max(x1). Else throw an error. Ditto for colnames, ncol, and x2.

6. codes[x1, x2]

### Value

a vector of the same length as x1 and x2.

### Author(s)

Spencer Graves

### See Also

`dim`

`rownames`

`link{colnames}`

### Examples

1 2 3 4 5 6 7 8 9 |

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