nvRD_cumulative_response {LightLogR}

Cumulative non-visual direct response

Description

This function calculates the cumulative non-visual direct response (nvRD). This is basically the integral of the nvRD over the provided time period in hours. The unit of the resulting value thus is "nvRD*h".

Usage

nvRD_cumulative_response(
  nvRD,
  Time.vector,
  epoch = "dominant.epoch",
  as.df = FALSE
)

Arguments

nvRD

Numeric vector containing the non-visual direct response. See nvRD.

Time.vector

Vector containing the time data. Can be POSIXct, hms, duration, or difftime.

epoch

The epoch at which the data was sampled. Can be either a duration or a string. If it is a string, it needs to be either "dominant.epoch" (the default) for a guess based on the data, or a valid duration string, e.g., "1 day" or "10 sec".

as.df

Logical. Should a data frame with be returned? If TRUE, a data frame with a single column named nvRD_cumulative will be returned. Defaults to FALSE.

Value

A numeric value or single column data frame.

References

Amundadottir, M.L. (2016). Light-driven model for identifying indicators of non-visual health potential in the built environment [Doctoral dissertation, EPFL]. EPFL infoscience. doi:10.5075/epfl-thesis-7146

See Also

Other metrics: bright_dark_period(), centroidLE(), disparity_index(), duration_above_threshold(), exponential_moving_average(), frequency_crossing_threshold(), interdaily_stability(), intradaily_variability(), midpointCE(), nvRC(), nvRD(), period_above_threshold(), pulses_above_threshold(), threshold_for_duration(), timing_above_threshold()

Examples

dataset1 <-
  tibble::tibble(
    Id = rep("A", 60 * 24),
    Datetime = lubridate::as_datetime(0) + lubridate::minutes(0:(60*24-1)),
    Illuminance = c(rep(0, 60*8), rep(sample(1:1000, 14, replace = TRUE), each = 60), rep(0, 60*2)),
    MEDI = Illuminance * rep(sample(0.5:1.5, 24, replace = TRUE), each = 60)
  ) %>%
  dplyr::mutate(
    nvRD = nvRD(MEDI, Illuminance, Datetime)
  ) 
dataset1 %>% 
  dplyr::summarise(
    "cumulative nvRD" = nvRD_cumulative_response(nvRD, Datetime)
  )