Where is the feaId from ?

[dichild]

Hi, I would like to transfer the Matlab Frontal.mat to binary file. Firstly I check the code of LoadModel in C++ file, but I didn't figure out how can I get the feaId variable in this line
fread(_feaId,sizeof(int),numBranchNodes,file);

[wincle]

sorry , i forget it for a long time.