Log-linearly interpolate values between two thresholds.

loglinear_interpolation(x, coordinate_one_x, coordinate_one_y,
  coordinate_two_x, coordinate_two_y)

Arguments

x

numeric x values for which interpolate y values.

coordinate_one_x

numeric value for lower x-coordinate.

coordinate_one_y

numeric value for lower y-coordinate.

coordinate_two_x

numeric value for upper x-coordinate.

coordinate_two_y

numeric value for upper y-coordinate.

Value

numeric values.

Details

Values are log-linearly interpolated at the x-coordinates specified in x using the lower and upper coordinate arguments to define the line. Values lesser or greater than these numbers are assigned the minimum and maximum y coordinates.

Examples

# create series of x-values x <- seq(0, 1000) # interpolate y-values for the x-values given the two reference points: # (200, 100) and (900, 15) y <- loglinear_interpolation(x, 200, 100, 900, 15) # plot the interpolated values
plot(y ~ x)
# add the reference points to the plot (shown in red) points(x = c(200, 900), y = c(100, 15), pch = 18, col = "red", cex = 2)