Insert wavelength values into spectral data.
Inserting wavelengths values immediately before and after a discontinuity in the SWF, greatly reduces the errors caused by interpolating the weighted irradiance during integration of the effective spectral irradiance. This is specially true when data have a large wavelength step size.
insert_hinges(x, y, h)
x |
numeric vector (sorted in increasing order) |
y |
numeric vector |
h |
a numeric vector giving the wavelengths at which the y values should be inserted by interpolation, no interpolation is indicated by an empty vector (numeric(0)) |
a data.frame with variables x and y. Unless the hinge
values were already present in y, each inserted hinge, expands the
vectors returned in the data frame by one value.
Insertion is a costly operation but I have tried to optimize this function as much as possible by avoiding loops. Earlier this function was implemented in C++, but a bug was discovered and I have now rewritten it using R.
Other low-level functions operating on numeric vectors.:
as_energy(),
as_quantum_mol(),
calc_multipliers(),
div_spectra(),
energy_irradiance(),
energy_ratio(),
integrate_xy(),
interpolate_spectrum(),
irradiance(),
l_insert_hinges(),
oper_spectra(),
photon_irradiance(),
photon_ratio(),
photons_energy_ratio(),
prod_spectra(),
s_e_irrad2rgb(),
split_energy_irradiance(),
split_photon_irradiance(),
subt_spectra(),
sum_spectra(),
trim_tails(),
v_insert_hinges(),
v_replace_hinges()
with(sun.data,
insert_hinges(w.length, s.e.irrad,
c(399.99, 400.00, 699.99, 700.00)))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.