An S4 class to represent space-time informations.

`dates`

A two column

`numeric`

matrix giving the date`value`

and`error`

, respectively.`coordinates`

A three columns

`numeric`

matrix (`x`

,`y`

and`z`

) giving the geographic coordinates (longitude, latitude and elevation, respectively).`epsg`

An

`integer`

giving the EPSG code of the spatial reference system used. Numeric values are coerced to`integer`

as by`as.integer`

(and hence truncated towards zero).

In the code snippets below, `x`

is a `SpaceTime`

object.

`get_dates(x)`

,`set_dates(x) <- value`

Get or set the dates of

`x`

according to`value`

(see`set_dates`

for details).`get_coordinates(x)`

,`set_coordinates(x) <- value`

Get or set the geographical coordinates of

`x`

according to`value`

(see`set_coordinates`

for details).`get_epsg(x)`

,`set_epsg(x) <- value`

Get or set the EPSG of

`x`

according to`value`

. Numeric values are coerced to`integer`

as by`as.integer`

(and hence truncated towards zero).`get_features(x)`

Convert an

`AbundanceMatrix`

object to a`data frame`

with dates and coordinates columns.