In gbasulto/rmiscfun: Miscellaneous functions in R

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

suppressPackageStartupMessages(library(rmiscfun))

Description

The function interpolate_values interpolates values with respect to another ordered variable. It returns a vector.

Suppose that you have have recorded a variable, say myvar, each three seconds. However, you want the values every two seconds. Assume that myvar is smooth (if numerical) or does it usually remains on the same value for several measurements, then interpolate_values will interpolate the values for you.

The parameter direction is set by default to "down". It might also be equal to "up". This is because the function combines the values of the two values of time (t_out, t_in) and uses tidyr::fill() to interpolate the values. The parameter direction is .direction in the latter function.

Simple example

library(rmiscfun)

df <- data.frame(t = c(1, 3, 7), vals = c("a", "b", "a"))

df

new_t <- c(1, 2, 4, 5)
new_vals <- with(df, interpolate_values(new_t, t, vals))

data.frame(new_t, new_vals)