Connectivity Multiplex Data format


This is the tutorial for the formatting of your connectivity multiplex data into BRAPH 2 format. In order to use BRAPH 2 via Graphical User Interfaces (GUI) and not command line, prepare your data in XLS/XLSX.


Prepare the data in XLS/XLSX

You need one folder per each subject containing one file per each layer with the connectivity data. All the subjects’ folders need to be inside a folder for the group, and to add covariates you should create an xlsx file inside the main group folder (optional). See the directories tree in Figure 1.

Figure 1. Directories tree of connectivity multiplex data containing 2 layers.

All the subjects’ folders must be in the same group folder; also, no other files should be in the folder. Inside each subject’s folder, there should be a file for each layer containing a matrix with each column and each row corresponding to a brain region (Figure 2).

con_2.png (566×679)

Figure 2. Example format of the data for one subject and one layer, derived from DTI.

The XLS/XLSX file containing the covariates must be inside the same group directory

and consists of the following columns:

Subject ID (column 1), Subject COVARIATE 1 (column 2), and Subject COVARIATE N (column 3).

The first row contains the headers and each subsequent row the values for each subject. When adding sex covariates one has to write “Female” or “Male” as value (Figure 3).


Figure 3. Example format of the covariates data file for one group.