yearmon
From chron v2.347
by Kurt Hornik
Convert monthly or quarterly data to chron
These functions can be used to convert the times of "ts"
series
with frequency
of 12 or 4 or objects of "yearmon"
and
"yearqtr"
class, as defined in the "zoo" package, to
chron
dates.
 Keywords
 ts
Usage
"as.chron"(x, frac = 0, holidays = FALSE, ...)
"as.chron"(x, frac = 0, holidays = FALSE, ...)
"as.chron"(x, frac = 0, holidays = FALSE, ...)
Arguments
 x
 an object of class
"yearmon"
or"yearqtr"
or"ts"
objects, or a numeric vector interpreted “in years” and fractions of years.  frac
 Number between zero and one inclusive representing the fraction of the way through the month or quarter.
 holidays
 If
TRUE
or a vector of chron dates, indicated holidays and weekends are excluded so the return value will be a nonholiday weekday.  ...
 Other arguments passed to
chron
.
Details
The "yearmon"
and "yearqtr"
classes are defined in
package zoo. If holidays
is TRUE
or a vector of
dates then the is.holiday
function is used to determine whether
days are holidays.
The method for ts objects converts the times corresponding to
time(x)
to chron. The ts series must have a frequency that is
a divisor of 12.
Value

Returns a
chron
object.
See Also
Examples
## Monthly time series data.
as.chron(AirPassengers)
as.chron(time(AirPassengers))
## convert to first day of the month that is not a weekend or holiday
as.chron(AirPassengers, frac = 0, holidays = TRUE)
## convert to last day of the month
as.chron(AirPassengers, frac = 1)
## convert to last day of the month that is not a weekend or holiday
as.chron(AirPassengers, frac = 1, holidays = TRUE)
## convert to last weekday of the month
as.chron(AirPassengers, frac = 1, holidays = c())
## Quarterly time series data.
as.chron(presidents)
as.chron(time(presidents))
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