| g.part4_extractid | R Documentation | 
Extracts ID from filename and finds matching rows in sleeplog. Function not designed for direct use by GGIR users.
  g.part4_extractid(idloc, fname, dolog, sleeplog, accid = c())
| idloc | See g.part4 | 
| fname | Full patth to filename | 
| dolog | Boolean to indicate whether to rely on a sleeplog | 
| sleeplog | Sleeplog data.frame passed on from g.part4 | 
| accid | ID extracted from the acceleration file in GGIR part3. If not available leave blank. | 
List with accid the ID and matching_indices_sleeplog a vector with matching row indices in the sleeplog
Vincent T van Hees <v.vanhees@accelting.com>
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