Random State

When performing reproducibility/variability experiments, it is important to isolate sources of variability. One such source is random state.

Random seed can be set in pipeline config

or on the command line with --random_seed $SEED.

Valid options are positive integers up to 2,147,483,647 or the word ‘random’ (which will set an integer in that range). If not specified, a seed will not be set, and each relevant process will run with an undocumented random seed.

When a seed is set, a random.log file, including the constant seed and each node the seed was applied to, will be generated in the logging directory.

The following processes currently support this feature:

antsAI
antsRegistration
Atropos
recon-all
mri_vol2vol
fslmaths
fslmaths
CPAC.registration.utils.hardcoded_reg