Gap filling by linear interpolation

Source: R/gap.fill.R

Fills gaps by linear interpolation between observations. This function provides the option to define the minimum window under which gaps should be filled, using linear interpolation.

gap.fill(input, max.gap = 60, decimals = 10, df = FALSE)

Arguments

input

an is.trex-compliant object.

max.gap

Numeric value providing the maximum size of a gap in minutes, which can be filled by performing a linear interpolation.

decimals

Integer value defining the number of decimals of the output (default = 10).

df

Logical; if TRUE, output is provided in a data.frame format with a timestamp and a value (\(\Delta T\) or \(\Delta V\)) column. If FALSE, output is provided as a zoo object (default = FALSE).

Value

A zoo object or data.frame in the appropriate format for further processing.

Examples


if (FALSE) {
# fill two hour gaps
raw   <- example.data(type = "doy")
input <-
  is.trex(
    raw,
    tz = "GMT",
    time.format = "%H:%M",
    solar.time = TRUE,
    long.deg = 7.7459,
    ref.add = FALSE,
    df = FALSE)

# create gaps in data
input[which(input < 0.4 | input > 0.82)] <- NA
fill_120 <- gap.fill(
  input = input,
  max.gap = 120,
  decimals = 10,
  df = FALSE)
fill_15 <- gap.fill(
  input = input,
  max.gap = 15,
  decimals = 10,
  df = FALSE)
  }