Calculate statistics on streamlines length


tckstats [ options ]  tracks_in
  • tracks_in: the input track file


  • -output field output only the field specified. Multiple such options can be supplied if required. Choices are: mean, median, std, min, max, count. Useful for use in scripts.
  • -histogram path output a histogram of streamline lengths
  • -dump path dump the streamlines lengths to a text file
  • -explicit explicitly calculate the length of each streamline, ignoring any step size information present in the header
  • -ignorezero do not generate a warning if the track file contains streamlines with zero length
  • -tck_weights_in path specify a text scalar file containing the streamline weights

Standard options

  • -info display information messages.
  • -quiet do not display information messages or progress status. Alternatively, this can be achieved by setting the MRTRIX_QUIET environment variable to a non-empty string.
  • -debug display debugging messages.
  • -force force overwrite of output files. Caution: Using the same file as input and output might cause unexpected behaviour.
  • -nthreads number use this number of threads in multi-threaded applications (set to 0 to disable multi-threading).
  • -help display this information page and exit.
  • -version display version information and exit.

Author: Robert E. Smith (

Copyright: Copyright (c) 2008-2018 the MRtrix3 contributors.

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, you can obtain one at

MRtrix3 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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