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Yocto-Spectral to spectra

Source: R/yocto-spectral2mspct.R
yocto_spectral2mspct.Rd

Convert a data frame with data imported with read_yocto_spctlog() into a collection of raw_spct objects.

Usage

yocto_spectral2mspct(df, channels = "all", ...)

Arguments

df

data.frame With only one of average, minimum or maximum sensor counts for each spectral channels.

channels

character vector of length one or longer. In addition to a vector of spectral sensor channel names as used in the AS7343 documentation, the nicknames "all", "wide", "narrow" and "xyz" as vectors of length one are accepted.

...

Arguments passed on to photobiology::subset2mspct

drop.idx

logical Flag indicating whether to drop or keep idx.var in the collection members.

ncol

integer Number of 'virtual' columns in data.

byrow

logical If ncol > 1 how to read in the data.

Details

The data frame, possibly after subsetting data columns, is pivoted into long form, and subsequently split by time stamp. The readings at each time point are converted into short spectra with at most 13 wavelength values, one from each channel.

Note

Currently, function subset2mspct() used in the conversion into a raw_mspct object can be slow in the case of 10000's of spectra.

See also

subset2mspct(), raw_spct().

Examples

nrow(yocto_spectral.df)
#> [1] 199
comment(yocto_spectral.df)
#> [1] "Data logged by a YoctoPuce USB module.\nData file \"yocto-spectral-LED.csv\" created on 2026-01-25 23:48:09.\nMetadata file \"SPECTRL1-2CF3B6.json\" created on 2026-01-25 23:48:09.\nImported on 2026-01-25 23:50:24 using TZ = \"UTC\" with 'rYoctoPuceInOut' (== 0.0.1.1).\n"
yocto_spectral.mspct <- yocto_spectral2mspct(yocto_spectral.df)
#> Creating a 'source_mspct' containing 199 'source_spct' objects.
summary(yocto_spectral.mspct)
#> Summary of raw_mspct [199 x 1] object: yocto_spectral.mspct
#> # A tibble: 199 × 7
#>    spct.idx           class dim   w.length.min w.length.max colnames multiple.wl
#>    <chr>              <chr> <chr>        <dbl>        <dbl> <list>         <dbl>
#>  1 2025-12-03 19:54:… raw_… [13 …         402.         852. <chr>              1
#>  2 2025-12-03 19:55:… raw_… [13 …         402.         852. <chr>              1
#>  3 2025-12-03 19:56:… raw_… [13 …         402.         852. <chr>              1
#>  4 2025-12-03 19:57:… raw_… [13 …         402.         852. <chr>              1
#>  5 2025-12-03 19:58:… raw_… [13 …         402.         852. <chr>              1
#>  6 2025-12-03 19:59:… raw_… [13 …         402.         852. <chr>              1
#>  7 2025-12-03 20:00:… raw_… [13 …         402.         852. <chr>              1
#>  8 2025-12-03 20:01:… raw_… [13 …         402.         852. <chr>              1
#>  9 2025-12-03 20:02:… raw_… [13 …         402.         852. <chr>              1
#> 10 2025-12-03 20:03:… raw_… [13 …         402.         852. <chr>              1
#> # ℹ 189 more rows
yocto_spectral.mspct[[1]]
#> Object: raw_spct [13 x 3]
#> Wavelength range 402.3-852.2 nm, step 13.3-109.4 nm 
#> Variables:
#>  w.length: Wavelength [nm]
#>  counts: Raw detector counts [number] 
#> --
#> # A tibble: 13 × 3
#>    channel counts w.length
#>    <chr>    <dbl>    <dbl>
#>  1 F1      0          402.
#>  2 F2      0          426.
#>  3 FZ      0.0192     452.
#>  4 F3      0          476.
#>  5 F4      0.0189     514.
#>  6 F5      0          546.
#>  7 FY      0.0854     560.
#>  8 FXL     0.0967     597.
#>  9 F6      0.0824     642.
#> 10 F7      0.0682     687 
#> 11 VIS     0.0814     723.
#> 12 F8      0          743.
#> 13 NIR     0          852.