aion (version 1.4.0)

as.data.frame: Coerce to a Data Frame

Description

Coerce to a Data Frame

Usage

# S4 method for TimeSeries
as.data.frame(x, ..., calendar = NULL)
# S4 method for TimeIntervals
as.data.frame(x, ..., calendar = NULL)

Value

A data.frame.

Arguments

x

A TimeSeries or a TimeIntervals object.

...

Further parameters to be passed to data.frame().

calendar

A TimeScale object specifying the target calendar (see calendar()). If NULL (the default), rata die are returned.

Methods (by class)

• as.data.frame(TimeSeries): Returns a long data.frame with the following columns:

  time

  The (decimal) years at which the time series was sampled.

  series

  The name of the time series.

  variable

  The name of the variables.

  value

  The observed value.

• as.data.frame(TimeIntervals): Returns a data.frame with the following columns:

  label

  The name of the intervals.

  start

  The start time of the intervals, in (decimal) years.

  end

  The end time of the intervals, in (decimal) years.

Author

N. Frerebeau

See Also

Other mutators: labels(), length(), subset()

Examples

## Create time-series of 20 observations

## Univariate
## Sampled every years starting from 1029 BCE
(X <- series(rnorm(30), time = 1029:1000, calendar = BCE()))

## Terminal and sampling times (returns rata die)
start(X)
end(X)
time(X)
span(X)

## Multivariate
## Sampled every century starting from 1000 CE
(Y <- series(matrix(rnorm(90), 30, 3), time = 1000:1029, calendar = CE()))

## Terminal and sampling times (returns Gregorian Common Era years)
start(Y, calendar = CE())
end(Y, calendar = CE())
time(Y, calendar = CE())
span(Y, calendar = CE())

## Coerce to data frame
df <- as.data.frame(Y, calendar = BP())
head(df)