tdata (version 0.3.0)

f.secondly: Create a Second-ly Frequency

Description

Use this function to create a frequency for time-series data that occurs every second in a day or a subset of a week.

Usage

f.secondly(day, second)

Value

An object of class ldtf. It is also a list with the following members:

class

Determines the class of this frequency.

day

Determines the day.

second

Determines the second.

Arguments

day

A 'Day-based' object of class ldtf, such as Daily or Daily-In-Week.

second

The index of the second in the day, which should be between 1 and 86400.

Details

In order to use the as.frequency function for this type of frequency, you need the following information:

• Character Format: "YYYYMMDD:#" (where # represents the value of second)

• Class Id: se|... (where '...' represents the 'class id' of day)

Examples

se0 <- f.secondly(f.daily(c(2023,5,16)),40032)

se0_value_str <-  as.character(se0) # this will be '20230516:40032'.
se0_class_str <- get.class.id(se0)
#     this will be 'se|d'. The second part (i.e., 'd') shows
#     that this frequency is defined in a 'Daily' frequency.

se_new <- as.frequency("20231101:3", "se|i:wed-sat")

# Don't make the following mistakes:
# \donttest{
mi_invalid <- try(as.frequency("20231101:3", "se|j:wed-sat"))
#  invalid format in day-based frequency
mi_invalid <- try(f.secondly(f.daily(c(2023,5,16)),100000)) # invalid second
# }