tfr.median.set {bayesTFR} | R Documentation |

These functions are to be used by expert analysts. They allow to change the projection medians either to specific values or shift the medians by a given constant, or by a specific adjusting procedure.

```
tfr.median.set(sim.dir, country, values, years = NULL)
tfr.median.shift(sim.dir, country, reset = FALSE, shift = 0,
from = NULL, to = NULL)
tfr.median.adjust(sim.dir, countries, factor1 = 2/3, factor2 = 1/3, forceAR1 = FALSE)
tfr.median.reset(sim.dir, countries)
```

`sim.dir` |
Directory containing the prediction object. |

`country` |
Name or numerical code of a country. |

`countries` |
Vector of country names or codes. |

`values` |
Array of the new median values. |

`years` |
Numeric vector giving years which |

`reset` |
Logical. If |

`shift` |
Constant by which the medians should be offset. It is not used if |

`from` |
Year from which the offset/reset should start. By default, it starts at the first prediction period. |

`to` |
Year until which the offset/reset should be done. By default, it is set to the last prediction period. |

`factor1, factor2` |
Adjusting factors for the first and second projection period, respectively (see below). |

`forceAR1` |
Logical. If |

The function `tfr.median.set`

can be used to set the medians of the given country to specific values. Function `tfr.median.shift`

can be used to offset the medians by a specific constant, or to reset the medians to their original BHM values.
Function `tfr.median.adjust`

runs the prediction procedure for the given countries with an additional decrement in the model in the first two projection periods. In the first projection period it is computed as `factor1*S`

where `S`

is a difference between observed decrement and the expected decrement (by the double logistic function) in the last observed period. In the second projection period, in the formula `factor1`

is replaced by `factor2`

. If `forceAR1`

is set to `TRUE`

, we recommend to set `factor1`

and `factor2`

to 0. The function then calls `tfr.median.set`

in order to store the new median for each country.
Function `tfr.median.reset`

resets medians of the given countries to the original values.

In all four functions, if a median is modified, the corresponding offset is stored in the prediction object (element `median.shift`

) and the updated prediction object is written back to disk. All functions in the package that use trajectories and trajectory statistics use the `median.shift`

values to offset the results correspondingly.

All three functions return an updated object of class `bayesTFR.prediction`

.

Hana Sevcikova, Leontine Alkema

[Package *bayesTFR* version 7.2-0 Index]