mpone {dae} | R Documentation |

## Converts the first two levels of a factor into the numeric values -1 and +1

### Description

Converts the first two `levels`

of a `factor`

into the numeric
values -1 and +1.

### Usage

`mpone(factor)`

### Arguments

`factor` |
The |

### Value

A numeric `vector`

.

### Warning

If the `factor`

has more than two `levels`

they will
be coerced to numeric values.

### Author(s)

Chris Brien

### See Also

`mpone`

in package dae, `factor`

,
`relevel`

.

### Examples

```
## generate all combinations of two two-level factors
mp <- c("-", "+")
Frf3.trt <- fac.gen(list(A = mp, B = mp))
## add factor C, whose levels are the products of the levles of A and B
Frf3.trt$C <- factor(mpone(Frf3.trt$A)*mpone(Frf3.trt$B), labels = mp)
```

[Package

*dae*version 3.2.28 Index]