Generate spectroscopic data

Source: R/generate-test-data.R

These functions generate hyper-spectral datasets that are mainly used for exploring and testing functionality of hyperSpec.

  • generate_hy_spectra() generates several spectra.

  • generate_hy_profile() generates depth, concentration, time-series profiles at a single wavelength.

  • generate_hy_map() generates hyper-spectral map.

generate_hy_spectra(n_wl = 50, n = 20)

generate_hy_profile(n = 20, wavelength = 550)

generate_hy_map(n_wl = 5, n_xy = 7, k = 5)

Arguments

n_wl

(integer) Number of wavelengths (points per spectrum).

n

(integer) Number of spectra.

wavelength

(numeric) A single numeric value for wavelength.

n_xy

(integer)number of pixels in x and y directions of hyper-spectral map.

k

integer not larger than n_xy. If k = n_xy, there are no empty pixels in the map. Otherwise, some pixels are empty.

Value

A hyperSpec object.

Author

V. Gegzna

Examples

# Generate spectra
hy_spectra <- generate_hy_spectra()
hy_spectra
#> hyperSpec object
#>    20 spectra
#>    5 data columns
#>    50 data points / spectrum

plot(hy_spectra)



# Generate profiles
hy_profile <- generate_hy_profile()
hy_profile
#> hyperSpec object
#>    20 spectra
#>    4 data columns
#>    1 data points / spectrum

plot_c(hy_profile, model = spc ~ t)

plot_c(hy_profile, model = spc ~ z)

plot_c(hy_profile, model = spc ~ c)



# Generate hyper-spectral map
hy_map <- generate_hy_map()
hy_map
#> hyperSpec object
#>    35 spectra
#>    4 data columns
#>    5 data points / spectrum

plot_map(hy_map)
#> Warning: device support for raster images unknown, ignoring 'raster=TRUE'

plot_map(hy_map[, , 8000])
#> Warning: device support for raster images unknown, ignoring 'raster=TRUE'