Clip head and tail of a spectrum based on wavelength limits, no interpolation used at range boundaries.
Usage
clip_wl(x, range, ...)
# Default S3 method
clip_wl(x, range, ...)
# S3 method for class 'generic_spct'
clip_wl(x, range = NULL, ...)
# S3 method for class 'generic_mspct'
clip_wl(x, range = NULL, expand = TRUE, ...)
# S3 method for class 'waveband'
clip_wl(x, range = NULL, ...)
# S3 method for class 'list'
clip_wl(x, range = NULL, ...)Arguments
- x
an R object.
- range
a numeric vector of length two, or any other object for which function
range()will return range of wavelengths expressed in nanometres.- ...
ignored (possibly used by derived methods).
- expand
logical Expand or not members containing spectra in long form.
Value
a spectrum object or a collection of spectral objects of the same
class as x with wavelength heads and tails clipped.
Methods (by class)
clip_wl(default): Default for generic functionclip_wl(generic_spct): Clip an object of class "generic_spct" or derived.clip_wl(generic_mspct): Clip an object of class "generic_mspct" or derived.clip_wl(waveband): Clip an object of class "waveband".clip_wl(list): Clip a list (of objects of class "waveband").
See also
Other trim functions:
trim_spct(),
trim_waveband(),
trim_wl()
Examples
clip_wl(sun.spct, range = c(400, 500))
#> Object: source_spct [101 x 3]
#> Wavelength range 400-500 nm, step 1 nm
#> Label: sunlight, simulated
#> Measured on 2010-06-22 09:51:00 UTC
#> Measured at 60.20911 N, 24.96474 E; Kumpula, Helsinki, FI
#> Variables:
#> w.length: Wavelength [nm]
#> s.e.irrad: Spectral energy irradiance [W m-2 nm-1]
#> s.q.irrad: Spectral photon irradiance [mol s-1 m-2 nm-1]
#> --
#> # A tibble: 101 × 3
#> w.length s.e.irrad s.q.irrad
#> <dbl> <dbl> <dbl>
#> 1 400 0.608 0.00000203
#> 2 401 0.626 0.00000210
#> 3 402 0.650 0.00000218
#> 4 403 0.621 0.00000209
#> 5 404 0.637 0.00000215
#> 6 405 0.626 0.00000212
#> 7 406 0.600 0.00000204
#> 8 407 0.595 0.00000202
#> 9 408 0.626 0.00000213
#> 10 409 0.662 0.00000226
#> # ℹ 91 more rows
clip_wl(sun.spct, range = c(NA, 500))
#> Object: source_spct [222 x 3]
#> Wavelength range 280-500 nm, step 0.9230769-1 nm
#> Label: sunlight, simulated
#> Measured on 2010-06-22 09:51:00 UTC
#> Measured at 60.20911 N, 24.96474 E; Kumpula, Helsinki, FI
#> Variables:
#> w.length: Wavelength [nm]
#> s.e.irrad: Spectral energy irradiance [W m-2 nm-1]
#> s.q.irrad: Spectral photon irradiance [mol s-1 m-2 nm-1]
#> --
#> # A tibble: 222 × 3
#> w.length s.e.irrad s.q.irrad
#> <dbl> <dbl> <dbl>
#> 1 280 0 0
#> 2 281. 0 0
#> 3 282. 0 0
#> 4 283. 0 0
#> 5 284. 0 0
#> 6 285. 0 0
#> 7 286. 0 0
#> 8 286. 0 0
#> 9 287. 0 0
#> 10 288. 0 0
#> # ℹ 212 more rows
clip_wl(sun.spct, range = c(400, NA))
#> Object: source_spct [401 x 3]
#> Wavelength range 400-800 nm, step 1 nm
#> Label: sunlight, simulated
#> Measured on 2010-06-22 09:51:00 UTC
#> Measured at 60.20911 N, 24.96474 E; Kumpula, Helsinki, FI
#> Variables:
#> w.length: Wavelength [nm]
#> s.e.irrad: Spectral energy irradiance [W m-2 nm-1]
#> s.q.irrad: Spectral photon irradiance [mol s-1 m-2 nm-1]
#> --
#> # A tibble: 401 × 3
#> w.length s.e.irrad s.q.irrad
#> <dbl> <dbl> <dbl>
#> 1 400 0.608 0.00000203
#> 2 401 0.626 0.00000210
#> 3 402 0.650 0.00000218
#> 4 403 0.621 0.00000209
#> 5 404 0.637 0.00000215
#> 6 405 0.626 0.00000212
#> 7 406 0.600 0.00000204
#> 8 407 0.595 0.00000202
#> 9 408 0.626 0.00000213
#> 10 409 0.662 0.00000226
#> # ℹ 391 more rows