FieldTrip

Note that this reference documentation is identical to the help that is displayed in Matlab when you type “help keep”.

  KEEP clears all the variables in the workspace except the ones you specify
  after the keep command. It works just like clear, but only for variables
 
  KEEP is a modified version of the KEEP M-file written by 
  Xiaoning (David) Yang (1998). It allows the use of the wildcard * as in the
  clear command
 
  Examples:
    keep set1data set2data set3data
    keep *data
 
  Martin Barugel (mbarugel@utdt.edu)