confInt.boxcoxfr {AID} | R Documentation |

## Mean and Asymmetric Confidence Interval for Back Transformed Data

### Description

`confInt.boxcoxfr`

calculates mean and asymmetric confidence interval for back transformed data in each group and plots their error bars with confidence intervals.

### Usage

```
## S3 method for class 'boxcoxfr'
confInt(x, level = 0.95, plot = TRUE, xlab = NULL, ylab = NULL, title = NULL,
width = NULL, verbose = TRUE, ...)
```

### Arguments

`x` |
a |

`level` |
the confidence level. |

`plot` |
a logical to plot error bars with confidence intervals. |

`xlab` |
a label for the x axis, defaults to a description of x. |

`ylab` |
a label for the y axis, defaults to a description of y. |

`title` |
a main title for the plot. |

`width` |
a numeric giving the width of the little lines at the tops and bottoms of the error bars (defaults to 0.15). |

`verbose` |
a logical for printing output to R console. |

`...` |
additional argument(s) for methods. |

### Details

Confidence interval in each group is constructed separately.

### Value

A matrix with columns giving mean, lower and upper confidence limits for back transformed data. These will be labelled as (1 - level)/2 and 1 - (1 - level)/2 in % (by default 2.5% and 97.5%).

### Author(s)

Osman Dag

### Examples

```
library(AID)
data(AADT)
attach(AADT)
out <- boxcoxfr(aadt, class)
confInt(out, level = 0.95)
```

*AID*version 2.9 Index]