get_max_min_values: Finds peak (or lowest) model output values

In DUToolkit: Visualizing and Quantifying Decision Uncertainty

Finds peak (or lowest) model output values

Description

For each policy alternative, this function finds the peak (or lowest if the threshold is a minimum) model output values for each simulation run.

Usage

get_max_min_values(data, tmin, tmax, Dt_max = TRUE)

Arguments

data	A list of data.frames (one data.frame for each policy alternative).
tmin	A numeric value or a date specifying the minimum simulation time to include in the analysis (ex. 1 or "2021-01-01"). This should correspond to a value in the first column of each data.frame in data.
tmax	A numeric value or a date specifying the maximum simulation time to include in the analysis (ex. 100 or "2021-04-10"). This should correspond to a value in the first column of each data.frame in data.
Dt_max	A logical value indicating whether the decision threshold is a maximum (TRUE) or a minimum (FALSE). The default is TRUE.

Value

A list of data.frame(s) containing the peak (or lowest) value and corresponding simulation time for each policy alternative.

data format

Each data.frame in data contains the results from multiple model runs using different parameter sets (e.g., from probabilistic sensitivity, uncertainty, or Bayesian inference analysis). The first column contains the model time and subsequent columns contain the predicted output for each simulation run at the respective time. The model time in the first column must contain numeric values indicating a simulation time (ex. 1, 2, 3,...) or dates (ex. "2021-01-01", "2021-01-02") which must be in R Date format (i.e., class="Date"). To ensure a consistent basis for comparison, the model time in the first column should be the same for each policy alternative (data.frame).

Examples

tmin <- "2021-01-01"
tmax <- "2021-04-10"
Dt <- rep(750, nrow(psa_data$Baseline))

peak_values_list <- get_max_min_values(
  psa_data,
  tmin = tmin,
  tmax = tmax,
  Dt_max = TRUE
)

DUToolkit documentation built on Sept. 14, 2025, 5:09 p.m.