interpolate_spectrum: Calculate spectral values at a different set of wavelengths

Description Usage Arguments Value Note See Also Examples

View source: R/interpolate.spectrum.r

Description

Interpolate/re-express spectral irradiance (or other spectral quantity) values at new wavelengths values. This is a low-level function operating on numeric vectors and called by higher level functions in the package, such as mathematical operators for classes for spectral data.

Usage

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interpolate_spectrum(w.length.in, s.irrad, w.length.out, fill = NA, ...)

Arguments

w.length.in

numeric vector of wavelengths (nm).

s.irrad

a numeric vector of spectral values.

w.length.out

numeric vector of wavelengths (nm).

fill

a value to be assigned to out of range wavelengths.

...

additional arguments passed to spline().

Value

a numeric vector of interpolated spectral values.

Note

The current version of interpolate uses spline if fewer than 25 data points are available. Otherwise it uses approx. In the first case a cubic spline is used, in the second case linear interpolation, which should be faster.

See Also

splinefun.

Other low-level functions operating on numeric vectors.: as_energy, as_quantum_mol, calc_multipliers, div_spectra, energy_irradiance, energy_ratio, insert_hinges, integrate_xy, 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

Examples

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my.w.length <- 300:700
with(sun.data, interpolate_spectrum(w.length, s.e.irrad, my.w.length))

photobiology documentation built on April 3, 2018, 1:06 a.m.