dot-read.dti.tcktsf: Read DTI tracking data from MRtrix TCK and TSF files.
In freesurferformats: Read and Write 'FreeSurfer' Neuroimaging File Formats

.read.dti.tcktsf

R Documentation

Read DTI tracking data from MRtrix TCK and TSF files.

Read DTI tracking data from MRtrix TCK and TSF files.

.read.dti.tcktsf(
  filepath,
  max_tracks = Inf,
  skip_tracks = 0L,
  bbox = NULL,
  chunk_values = 4e+06
)

`filepath`	character string, path to the `TCK` or `TSF` file to read. Gzip-compressed files (i.e., `.tck.gz`) are supported and the compression is detected from the file content, not the file name.
`max_tracks`	numeric, the maximum number of tracks to read. Use `Inf` (the default) to read all tracks. This allows reading a subset of a very large tractogram without holding all of it in memory.
`skip_tracks`	integer, the number of tracks to skip before reading any. Skipped tracks are never held in memory.
`bbox`	numeric vector of length 6 or NULL. If given, only tracks that have at least one point inside the box are read, the box is given as `c(xmin, xmax, ymin, ymax, zmin, zmax)` in the coordinate system of the stored data. This has no effect for TSF files, which store no coordinates. The number of matching tracks cannot be known in advance, so for very large files this should be combined with a `max_tracks` value that is known to be safe.
`chunk_values`	integer, the number of payload values that are read per chunk. This is an advanced tuning parameter that does not change the result, only the peak memory usage (at most one chunk is buffered at a time) and the granularity of the file reads. The default of 4e6 values corresponds to about 32 MB of doubles. Lower it on a machine with very little free memory.