quantmod (version 0.3-3)

minutes: Extract Minutes, Hours, or Days of a High Frequency Time Series Object

Description

Extract the minutes or hours of a day, or days since the beginning of the year This function is a generic, with currently a single method implemented for objects of class zoo.

Usage

## S3 method for class 'zoo':
seconds(x,k=1,...)
seconds(x,k=1,...)
## S3 method for class 'zoo':
minutes(x,k=1,...)
minutes(x,k=1,...)
minutes3(x,...)
minutes5(x,...)
minutes10(x,...)
minutes15(x,...)
minutes30(x,...)
## S3 method for class 'zoo':
hours(x,...)
## S3 method for class 'zoo':
days(x,...)

Arguments

x

zoo object with index of class Date

k

used to identify which bar obs. belongs to

...

additional unused arguments

Value

• minutes returns the minute of the day as a character [0-59]

  hours returns the hour of the day as a character [0-23]

  days returns the day of the year as a character [001-366]

Details

Behaves exactly as weekdays, months and quarters from base with the obvious difference in that the method extracts the minutes or hours of a day, and day of the year for a given object.

minutes3, minutes5, minutes10, minutes15, minutes30 are wrappers to the appropriate minutes time scale.

See Also

weekdays, Date, POSIXlt,

Examples

start.time <- as.POSIXlt("2004-12-31 00:08:30")
minute.data <- zoo(rnorm(251),seq(start.time,start.time+15000,by=60))
minutes(minute.data)
minutes5(minute.data)
hours(minute.data)
days(minute.data)