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Utility Function to Prepare Linear Regression Edges of Trapezoid

Source: R/trapezoid_utilities.R
linear_coefficients.Rd

Called by optram_wetdry_coefficients to prepare linear regression line along trapezoid edges Calculates the intercept and slope of both wet and dry edges Not exported

Usage

linear_coefficients(df, output_dir)

Arguments

df,

data.frame, values of VI and STR along edges of trapezoid

output_dir,

string, path to save coefficients CSV file

Value

df, data.frame, the trapezoid line edge points with fitted wet/dry values added

Note

Three CSV files are saved:

  • the regressions coefficients,

  • the trapezoid edge points

  • RMSE of the fitted curve

Examples

if (FALSE) {
edges_file <- system.file("extdata/trapezoid_edges.csv",
                           package = "rOPTRAM")
df <- read.csv(edges_file)
output_dir <- tempdir()
coeffs <- linear_coefficients(df, output_dir)
coeffs
}