ggtornado: Create a "tornado" plot using ggplot2

In emse-madd-gwu/maddTools: Miscellaneous Functions For EMSE 6035

Create a "tornado" plot using ggplot2

Description

This function creates a "tornado" plot using the ggplot2 package. These are primarily used to display results of a sensitivity analysis.

Usage

ggtornado(data, baseline, var, level, value, result)

Arguments

data	A data frame containing the results of a sensitivity analysis.
baseline	The baseline value for the sensitivity analysis.
var	The data column identifying the variable name being varied.
level	The data column identifying the sensitivity case level (usually 'high' or 'low', relative to the baseline).
value	The data column identifying the value of the variable being varied.
result	The data column identifying the result when the variable 'var' is set at the value of 'value'.

Examples

# Create an example data frame of a sensitivity analysis - columns:
# 'var'    <- The name of the variable being varied.
# 'level'  <- 'high' or 'low' (relative to the baseline).
# 'value'  <- The value of the variable being varied.
# 'result' <- The result of the output value at the varied variable value.
data <- data.frame(
    var    = c('price', 'price', 'fuelEconomy', 'fuelEconomy',
               'accelTime', 'accelTime'),
    level  = rep(c('high', 'low'), 3),
    value  = c(10, 20, 25, 15, 10, 6),
    result = c(0.95, 0.15, 0.90, 0.60, 0.85, 0.75)
)

# Make a tornado plot of the sensitivity analysis results:
library(ggplot2)

ggtornado(
    data = data,
    baseline = 0.8, # Baseline result
    var    = 'var',
    level  = 'level',
    value  = 'value',
    result = 'result'
)

emse-madd-gwu/maddTools documentation built on Oct. 31, 2022, 2:23 p.m.