Skip to contents

Calculate values by means of a nth degree polynomial from user-supplied constants (for example from a lamp calibration certificate).

Usage

D2_spectrum(w.length, k = photobiology::D2.UV653, fill = NA_real_)

Arguments

w.length

numeric vector of wavelengths (nm) for output

k

a polynom:polynomial object with n constants for the polynomial

fill

if NA, no extrapolation is done, and NA is returned for wavelengths outside the range 190 nm to 450 nm. If NULL then the tails are deleted. If 0 then the tails are set to zero, etc. NA is default.

Value

a dataframe with four numeric vectors with wavelength values (w.length), energy and photon irradiance (s.e.irrad, s.q.irrad) depending on the argument passed to unit.out (s.irrad).

Note

This is function is valid for wavelengths in the range 180 nm to 495 nm, for wavelengths outside this range NAs are returned.

Examples

D2_spectrum(200)
#> Object: source_spct [1 x 2]
#> Wavelength range 200-200 nm, step NA nm 
#> Variables:
#>  w.length: Wavelength [nm]
#>  s.e.irrad: Spectral energy irradiance [W m-2 nm-1] 
#> --
#> # A tibble: 1 × 2
#>   w.length s.e.irrad
#>      <dbl>     <dbl>
#> 1      200    0.0801
D2_spectrum(170:220)
#> Object: source_spct [51 x 2]
#> Wavelength range 170-220 nm, step 1 nm 
#> Variables:
#>  w.length: Wavelength [nm]
#>  s.e.irrad: Spectral energy irradiance [W m-2 nm-1] 
#> --
#> # A tibble: 51 × 2
#>    w.length s.e.irrad
#>       <int>     <dbl>
#>  1      170        NA
#>  2      171        NA
#>  3      172        NA
#>  4      173        NA
#>  5      174        NA
#>  6      175        NA
#>  7      176        NA
#>  8      177        NA
#>  9      178        NA
#> 10      179        NA
#> # ℹ 41 more rows