ir_new_ir is the constructor function for objects of class
ir.
An object of class ir is a tibble::tbl_df() with a
sample in each row and a list column containing spectra for each sample.
Usage
ir_new_ir(spectra, metadata = tibble::tibble())Arguments
- spectra
A named list in which each element contains spectral data for one measurement. Each list element must be a
data.framewith two columns and a row for each wavenumber value in the spectra data. The first column must contain unique wavenumber values and the second column intensity values of the measured spectrum of the sample.- metadata
An optional
data.framewith additional columns containing metadata for the spectra inspectra. Optionally, an emptydata.framecan be defined if no metadata are available.
Value
An object of class ir with the following columns:
- spectra
A list column identical to
spectra.- ...
Additional columns contained in
metadata.
Examples
ir_new_ir(
spectra = ir_sample_data$spectra,
metadata = ir_sample_data %>% dplyr::select(-spectra)
)
#> # A tibble: 58 × 7
#> id_measurement id_sample sample_type sample_comment klason_lignin
#> * <int> <chr> <chr> <chr> [1]
#> 1 1 GN 11-389 needles Abies Firma Momi fir 0.360
#> 2 2 GN 11-400 needles Cupressocyparis leylandii… 0.339
#> 3 3 GN 11-407 needles Juniperus chinensis Chine… 0.268
#> 4 4 GN 11-411 needles Metasequoia glyptostroboi… 0.350
#> 5 5 GN 11-416 needles Pinus strobus Torulosa 0.331
#> 6 6 GN 11-419 needles Pseudolarix amabili Golde… 0.279
#> 7 7 GN 11-422 needles Sequoia sempervirens Cali… 0.330
#> 8 8 GN 11-423 needles Taxodium distichum Cascad… 0.357
#> 9 9 GN 11-428 needles Thuja occidentalis Easter… 0.369
#> 10 10 GN 11-434 needles Tsuga caroliniana Carolin… 0.289
#> # … with 48 more rows, and 2 more variables: holocellulose [1],
#> # spectra <named list>