hsdar (version 0.5.1)

checkhull: Check continuum line

Description

Check if continuum line is intersecting the reflectance curve.

Usage

checkhull(x, ispec)

Arguments

x

Object of class clman.

ispec

ID or index of spectrum to be checked.

Value

Object of class list.

See Also

transformSpeclib, addcp, deletecp, makehull, updatecl

Examples

## Model spectra using PROSAIL
parameter <- data.frame(N = rep.int(c(1, 1.5),2), LAI = c(1,1,3,3))
spec <- PROSAIL(parameterList=parameter)

## Transform spectra
spec_clman <- transformSpeclib(spec, method = "sh", out = "raw")

## Plot original line
par(mfrow = c(1,2))
plot(spec_clman, ispec = 1, subset = c(2480, 2500))

## Add fix point at 4595 nm to continuum line of first spectrum
spec_clman <- addcp(spec_clman, 1, 2495)

## Plot new line
plot(spec_clman, ispec = 1, subset = c(2480, 2500))

## Check new hull
hull <- checkhull(spec_clman, 1)
hull$error

## Add fix point at 4596 nm to continuum line of first spectrum
spec_clman <- addcp(spec_clman, 1, 2496)

## Check new hull
hull <- checkhull(spec_clman, 1)
hull$error