Minima of a univariate functional dataset

This function computes computes the minimum value of each element of a univariate functional dataset, optionally returning also the value of the grid where they are fulfilled.

minima(fData, ..., which = FALSE)

Arguments

fData

the functional dataset containing elements whose minima have to be computed, in form of fData object.

...

additional parameters.

which

logical flag specifying whether the grid values where minima are fulfilled have to be returned too.

Value

If which = FALSE, the function returns a vector containing the minima for each element of the functional dataset; if which = TRUE, the function returns a data.frame whose field value contains the values of minima, and grid contains the grid points where minima are reached.

See also

maxima

Examples

P = 1e3

grid = seq( 0, 1, length.out = P )

Data = matrix( c( 1 * grid,
                  2 *  grid,
                  3 * ( 0.5 - abs( grid - 0.5 ) ) ),
               nrow = 3, ncol = P, byrow = TRUE )

fD = fData( grid, Data )

minima( fD, which = TRUE )
#>   grid value
#> 1    0     0
#> 2    0     0
#> 3    0     0