extract data characteristics (time or spectrum) from each column of a sensor, feature or annotation data file

Source: R/mhealth.extract.R 
mhealth.extract_characteristics(df, file_type, select_cols, group_cols = c(),
  preset = "stat")

Arguments

group_cols

default is empty, if so, it will extract on all rows
preset

predefined feature sets, see description for detailed definition for each set

Note

Check NULL for returned value.