write_spec {OpenSpecy}

Read and write spectral data

Description

Functions for reading and writing spectral data to and from OpenSpecy format. OpenSpecy objects are lists with components wavenumber, spectra, and metadata. Currently supported formats are .y(a)ml, .json, .csv, or .rds.

Usage

write_spec(x, ...)

## Default S3 method:
write_spec(x, ...)

## S3 method for class 'OpenSpecy'
write_spec(x, file, method = NULL, digits = getOption("digits"), ...)

read_spec(file, share = NULL, method = NULL, ...)

as_hyperSpec(x)

Arguments

x

an object of class OpenSpecy.

file

file path to be read from or written to.

method

optional; function to be used as a custom reader or writer. Defaults to the appropriate function based on the file extension.

digits

number of significant digits to use when formatting numeric values; defaults to getOption("digits").

share

defaults to NULL; needed to share spectra with the Open Specy community; see share_spec() for details.

...

further arguments passed to the submethods.

Details

Due to floating point number errors there may be some differences in the precision of the numbers returned if using multiple devices for .json and .yaml files but the numbers should be nearly identical. readRDS() should return the exact same object every time.

Value

read_spec() reads data formatted as an OpenSpecy object and returns a list object of class OpenSpecy containing spectral data. write_spec() writes a file for an object of class OpenSpecy containing spectral data. as_hyperspec() converts an OpenSpecy object to a hyperSpec-class object.

Author(s)

Zacharias Steinmetz, Win Cowger

See Also

OpenSpecy(); read_text(), read_asp(), read_spa(), read_spc(), and read_jdx() for text files, .asp, .spa, .spa, .spc, and .jdx formats, respectively; read_zip() and read_any() for wrapper functions; saveRDS(); readRDS(); write_yaml(); read_yaml(); write_json(); read_json();

Examples

read_extdata("raman_hdpe.yml") |> read_spec()
read_extdata("raman_hdpe.json") |> read_spec()
read_extdata("raman_hdpe.rds") |> read_spec()
read_extdata("raman_hdpe.csv") |> read_spec()

## Not run: 
data(raman_hdpe)
write_spec(raman_hdpe, "raman_hdpe.yml")
write_spec(raman_hdpe, "raman_hdpe.json")
write_spec(raman_hdpe, "raman_hdpe.rds")
write_spec(raman_hdpe, "raman_hdpe.csv")

# Convert an OpenSpecy object to a hyperSpec object
hyper <- as_hyperSpec(raman_hdpe)

## End(Not run)