iso_data_structure: Isoreader data structure functions
In isoreader: Read Stable Isotope Data Files

iso_is_file tests if the object is an iso_file

iso_is_file_list tests if the object is an iso_file list (collection of iso_files)

iso_is_object test if the object is an iso-object (iso_file or iso_file list)

iso_is_dual_inlet tests if an iso_file or iso_file list consists exclusively of dual inlet file objects

iso_is_continuous_flow tests if an iso_file or iso_file list consists exclusively of continuous flow file objects

iso_is_scan tests if an iso_file or iso_file list consists exclusively of scan file objects

iso_as_file_list concatenates iso_file and iso_file list object(s) into one combined iso_file list (equivalent to calling c(...)), flattens all passed lists into one list structure, all individual objects and objects within iso_file lists have to be the same type of iso_file, issues warnings if there are duplicate file ids and summarizes all problems in the iso_file list. If duplicates are allowed (discard_duplicates = FALSE), their file IDs will append a #1, #2, #3, etc. to preserve unique file IDs (important for many data aggregation operations).

iso_is_file(x)

iso_is_file_list(x)

iso_is_object(x)

iso_is_dual_inlet(x)

iso_is_continuous_flow(x)

iso_is_scan(x)

iso_as_file_list(..., discard_duplicates = TRUE)

`x`	an object to test whether it has the specific class
`...`	iso_file and iso_file_list objects to concatenate
`discard_duplicates`	whether to automatically discard files with duplicate file IDs (i.e. duplicate file names). If `TRUE` (the default), only the first files are kept and any files with the same file ID are discarded. If `FALSE`, all duplicate files are kept but their file IDs are appended with suffix `#1`, `#2`, etc.