sub-.uts: Extract or Replace Parts of a uts

In andreas50/uts: Unevenly-spaced Time Series

Description

The accessor method ("[") extracts a sub-sampled time series with the provided times. The replacement method ("[<-") inserts observation values at the provided observation times, replacing observations values for already existing observation times (if any).

Usage

## S3 method for class 'uts'
x[time_points, ...]

## S3 replacement method for class 'uts'
x[time_points, ...] <- value

Arguments

x	a "uts" object.
time_points	either a strictly increasing sequence of POSIXct date-times, or a "uts" with logical observation values.
...	further arguments passed to sample_values.
value	a vector of observation values to insert at the time points time_points.

Examples

# Sample at single time point
ex_uts()[as.POSIXct("2000-01-01")]

# Sample at multiple time points, optionally restricting the maximum time difference
# between sampling and observation times
times <- as.POSIXct(c("2007-11-08 11:01:00", "2007-11-09 15:16:00"))
ex_uts()[times]
ex_uts()[times, max_dt = dhours(1)]
# Insert multiple numeric values
test <- ex_uts()
test[Sys.time() + ddays(1:2)] <- c(51, 52)

# Insert non-numeric value
test <- ex_uts()
test[Sys.time() + ddays(3)] <- list(cat=1, dog=2)

# Replacement times from logical "uts"
test <- ex_uts()
test[test >= 48] <- 50

andreas50/uts documentation built on April 8, 2021, 10:03 a.m.