# boundary.Fstats

##### Boundary for F Statistics

Computes boundary for an object of class `"Fstats"`

- Keywords
- regression

##### Usage

```
# S3 method for Fstats
boundary(x, alpha = 0.05, pval = FALSE, aveF = FALSE,
asymptotic = FALSE, ...)
```

##### Arguments

- x
an object of class

`"Fstats"`

.- alpha
numeric from interval (0,1) indicating the confidence level for which the boundary of the supF test will be computed.

- pval
logical. If set to

`TRUE`

a boundary for the corresponding p values will be computed.- aveF
logical. If set to

`TRUE`

the boundary of the aveF (instead of the supF) test will be computed. The resulting boundary then is a boundary for the mean of the F statistics rather than for the F statistics themselves.- asymptotic
logical. If set to

`TRUE`

the asymptotic (chi-square) distribution instead of the exact (F) distribution will be used to compute the p values (only if`pval`

is`TRUE`

).- ...
currently not used.

##### Value

an object of class `"ts"`

with the same time properties as
the time series in `x`

##### See Also

##### Examples

```
# NOT RUN {
## Load dataset "nhtemp" with average yearly temperatures in New Haven
data("nhtemp")
## plot the data
plot(nhtemp)
## test the model null hypothesis that the average temperature remains
## constant over the years for potential break points between 1941
## (corresponds to from = 0.5) and 1962 (corresponds to to = 0.85)
## compute F statistics
fs <- Fstats(nhtemp ~ 1, from = 0.5, to = 0.85)
## plot the p values without boundary
plot(fs, pval = TRUE, alpha = 0.01)
## add the boundary in another colour
lines(boundary(fs, pval = TRUE, alpha = 0.01), col = 2)
# }
```

*Documentation reproduced from package strucchange, version 1.5-1, License: GPL-2 | GPL-3*