pro thin_training

   input = 'ecm_training_abi.sav'
   output = 'ecm_training_abi_test.sav'

;  input = 'g16_ecm_training_every10_2018_19_full_sds.sav'
;  output = 'ecm_training_goes16_denis.sav'

;  input = 'ecm_training_myd02ssh.sav'
;  output = 'ecm_training_myd02ssh_thin.sav'

   restore, input

   nfull = n_elements(training_data.latitude)

   print, 'full number = ', nfull

   nout = long(nfull / 2)

   idx = round(float(nfull-1)*randomu(seed,nout))

   x = training_data
   training_data = x[idx]

   save, file=output, training_data, TRAINING_DATA_CODE_ID_STRING, TRAINING_DATA_CREATION_TIME_STRING


stop

end