codeplot | R Documentation |

Handles output from `velout`

function to display growth curves with
outlying points, either plotting or zapping the outliers.

```
codeplot(outliers, icode = 4, ..., print = TRUE)
zapvelout(outliers, icode)
```

`outliers` |
Data frame returned from velout. |

`icode` |
The code number(s) defining the subset of curves to be displayed or zapped (between 1 and 6). |

`...` |
Optional plot parameters. |

`print` |
Option to print as well as plot information on each curve. |

The function `velout`

identifies putative outliers for `y`

in
`data`

, `codeplot`

plots them, and `zapvelout`

sets missing
those confirmed as outliers. Codes range from 0 (normal) to 8, where 4 and
6 are conventional outliers (see `velout`

).

`codeplot`

returns summary information on each curve with an
outlier of the relevant code, and optionally plots the curve.
`zapvelout`

sets to NA values of `y`

whose code is contained in
`icode`

, and returns the modified data frame.

Tim Cole tim.cole@ucl.ac.uk

`velout`

```
## identify outliers
outliers <- velout(age, height, id, heights, limit=2)
## plot outliers with code 4 or 6
codeplot(outliers, icode=c(4,6))
## set the 8 outliers missing
newheights <- zapvelout(outliers, icode=6)
```

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