build.mrtrix.header.stable: Determine the length of an MRtrix streamlines header.

In freesurferformats: Read and Write 'FreeSurfer' Neuroimaging File Formats

Determine the length of an MRtrix streamlines header.

Description

The length of the header determines the data offset that is stored inside the header, so the two have to be reconciled: the offset is written with a number of digits that depends on its own value, which can change the length of the header. Starting from an offset guess and recomputing until it is stable always terminates, since the length only ever grows with the number of digits and that number is bounded.

Usage

build.mrtrix.header.stable(header_id, entries, datatype, count)

Arguments

header_id	character string, the file type identifier, one of 'mrtrix tracks' (TCK) or 'mrtrix track scalars' (TSF).
entries	named list of additional header entries.
datatype	character string, the datatype.
count	integer, the number of streamlines.

Value

named list with entries text (the header) and offset.

freesurferformats documentation built on Sept. 25, 2026, 1:07 a.m.