subset.time.table.parts: Extract specific columns from a time.table
In rossklin/timetablr: Representation and basic operation for multiple time series.

Extract columns from a time.table (producing a data.table) by their function (as index, time, measurement, or auxiliary).

## S3 method for class 'time.table.parts'
subset(tt, with.index = FALSE, with.time = FALSE,
  with.measurement = FALSE, with.auxiliary = FALSE, rekey = (with.index |
  with.time), manual = c())

`tt`	time table to export from
`with.index`	extract index columns
`with.time`	extract time column
`time.measurement`	extract measurement columns
`with.auxiliary`	extract auxiliary columns
`rekey`	whether to keep the index/time key(s) in the resulting data.table
`manual`	add additional columns to include (by name) You probably want one of `index`, `time`, `measurement`, or `auxiliary`.