>Psychtoolbox>PsychOneliners

in = DeEmptify(in,column)
deletes empty cells or rows from cellarray:

• if only IN is specified, IN has to be a vector. IN will be returned
  with all empty cells deleted
• if IN is a matrix, COLUMN must be specified. Rows are only
  deleted from IN when an empty cell is encountered in a column
  specified in COLUMN. COLUMN can be a vector

Example:
DeEmptify({‘’,’r’,’’,’re’})
ans =
‘r’ ‘re’

a = {‘p’ ‘r’ ‘’; …
‘’ ‘re’ ‘r’}

DeEmptify(a,3)
ans =
‘’ ‘re’ ‘r’

DeEmptify(a,1)
ans =
‘p’ ‘r’ ‘’

DeEmptify(a,1) or DeEmptify(a,[1 3])
ans =
Empty cell array: 0-by-3