Filter isofiles by measurement type

Convenience wrappers around ir_filter_metadata() that keep only the files of a single measurement type (using the metadata type column): continuous flow ("cf"), dual inlet ("di"), or scan ("scan"). Like ir_filter_metadata() they work on both ir_isofiles (from ir_read_isofiles()) and ir_aggregated_data (from ir_aggregate_isofiles()) objects, cascade to the other datasets, and drop any file whose metadata ends up empty.

Usage

ir_filter_for_continuous_flow(isofiles)

ir_filter_for_dual_inlet(isofiles)

ir_filter_for_scans(isofiles)

Arguments

isofiles

a collection of isofiles from ir_read_isofiles() (ir_isofiles) or datasets aggregated from ir_aggregate_isofiles() (ir_aggregated_data)

Value

the isofiles object filtered to the requested measurement type

Details

Files whose metadata has no type column (e.g. a file that errored during reading) never match and are dropped.

Functions

• ir_filter_for_continuous_flow(): keep only continuous flow files (type == "cf")

• ir_filter_for_dual_inlet(): keep only dual inlet files (type == "di")

• ir_filter_for_scans(): keep only scan files (type == "scan")