read_spectra: Read files from various formats into 'spectra'

In spectrolab: Class and Methods for Spectral Data

Read files from various formats into 'spectra'

Description

Read files from various formats into 'spectra'

Usage

read_spectra(
  path,
  format = NULL,
  type = "target_reflectance",
  extract_metadata = FALSE,
  exclude_if_matches = NULL,
  ignore_extension = FALSE
)

Arguments

path	Path to directory or input files.
format	File format. Defaults to NULL so spectrolab tries to guess it from the file name. Alternatively, use "asd" for ASD; "sig" for SVC (Spectra Vista); or "sed" for PSR (Spectral Evolution)
type	Data type to read. "target_reflectance", "target_radiance", or "reference_radiance". Defaults to "target_reflectance".
extract_metadata	Boolean. Defaults to FALSE. Only implemented for the Spectra Vista (.sig) and Spectral Evolution (.sed) file types.
exclude_if_matches	excludes files that match this regular expression. Example: "BAD"
ignore_extension	Boolean. If TRUE, the parser will try to read every file in path regardless of the expected extension.

Value

a single 'spectra' or a list of 'spectra' (in case files have incompatible band number or bands values)

Author(s)

Jose Eduardo Meireles

Examples

library(spectrolab)
dir_path = system.file("extdata", "Acer_example", package = "spectrolab")

spec     = read_spectra(path = dir_path, format = "sig")

spectrolab documentation built on Feb. 16, 2023, 10:27 p.m.