"IsReg.ts" is a wrapping Function for Function "is.regular" from "zoo" package. Given a time series (ts) a "data.frame" object it is converted into a "xts" object, while the regularity of the object is checked. The first column of the "data.frame" should contain a character string vector to be converted via as.POSIXct accordingly with the date format (format) and time zone (tz).
an object of class
character string giving a date-time format as used by
a time zone specification to be used for the conversion, if one is required. System-specific, but "" is the current time zone, and "GMT" is UTC (Universal Time, Coordinated). Invalid values are most commonly treated as UTC, on some platforms with a warning.
"IsReg" calls the as.POSIXct function from
base package to convert an object to one of the two
classes used to represent date/times (calendar dates plus time to the nearest second).
More details can be found in the "is.regular" function of the "zoo" package.
Object of class
"list". This object contains 2 elements,
the first one contains a character string "_TSregular" if the xts object created is strict regular,
or "_TSirregular" if it is strict irregular. More details can be found in the "is.regular" function of the
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