Directory structure and data file organization

Any directory that contains one or more files with the .snirf extension is considered by Homer3 to be a group, organized into sub-groups called subjects (or sessions).

Each .snirf file in the group is in the SNIRF format and logically belongs to a subject. The name of each .snirf file determines to which subject it belongs. By organizing files in the way shown in the following figure, it is possible to calculate and view the hemodynamic response to different stimuli averaged at the run level, at the subject level, and at the group level.

For example, the 'Sampledata' group
subjA_run01.snirf
subjA_run02.snirf
subjA_run03.snirf
subjB_run01.snirf
subjB_run02.snirf
subjC_run01.snirf
subjC_run02.snirf
subjD_run01.snirf
subjE_run01.snirf
subjE_run02.snirf
subjE_run03.snirf consists of the 5 subjects, subjA, subjB, subjC, subjD and subjE, with 3, 2, 2, 1 and 3 runs respectively.

After loading the group into Homer3, these .snirf format files will be displayed in the Homer3 GUI as shown below.