epidataCS_permute | R Documentation |

`"epidataCS"`

Monte Carlo tests for space-time interaction (`epitest`

)
use the distribution of some test statistic under the null hypothesis
of no space-time interaction. For this purpose, the function
`permute.epidataCS`

randomly permutes the time or space labels of
the events.

```
permute.epidataCS(x, what = c("time", "space"), keep)
```

`x` |
an object of class |

`what` |
character string determining what to permute: time points (default) or locations. |

`keep` |
optional logical expression to be evaluated in the context
of |

the permuted `"epidataCS"`

object.

Sebastian Meyer

`epitest`

```
data("imdepi")
set.seed(3)
permepi <- permute.epidataCS(imdepi, what = "time", keep = time <= 30)
print(imdepi, n = 8)
print(permepi, n = 8)
## the first 6 events are kept (as are all row.names),
## the time labels of the remaining events are shuffled
## (and events then again sorted by time),
## the marginal temporal distribution is unchanged
```

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