fit_curve: Curve fitting

In kueckelj/confuns: Convenience Functions

Curve fitting

Description

Fits a curve to a numeric vector.

Usage

fit_curve(input, fn, rev = FALSE, normalize = TRUE)

Arguments

input	Numeric vector.
fn	Character value. The function to call specified as a string. Must be in output of validCurves().
rev	If set to 1 or 'x' the fitted curve is returned reverted along the x-axis. If set to 2 or 'y' the fitted curve is returned reverted along the y-axis. (Depending on the curve 1 or 2 might not differ in the output. Compare fn = 'sinus' and fn = 'one_peak').
normalize	Logical. If set to TRUE numeric values will be scaled to values between one and zero.

Details

This function takes a numeric vector of length x and returns a numeric vector of the same length. The values of the returned vector correspond to the values needed to display or work with the pattern specified in fn.

Value

Numeric vector.

Examples

library(tidyverse)
library(confuns)
library(magrittr)


data.frame(variable = normalize(base::log(1:100))) %>%
 dplyr::mutate(
   curve = fit_curve(input = variable, fn = "sinus", normalize = TRUE),
   residuals = (variable - curve) %>% normalize() ,
   seq = row_number()) %>%
 tidyr::pivot_longer(
   cols = dplyr::all_of(x = c("curve", "residuals", "variable")),
   names_to = "pattern",
   values_to = "values") %>%
 ggplot(mapping = aes(x = seq, y = values)) +
 geom_line(mapping = aes(color = pattern))

kueckelj/confuns documentation built on July 4, 2024, 4:53 p.m.