1. Extract CFG (ida file) from IDA pro, mainly run preprocessing_ida.py

2. Extract Node, Edge, Adj from ida file, represents attributes of basic block, weight of link, mainly run draw.py

3. Extract att.mat, Wei.mat from Node,Edge,Adj, mainly run listiimat.py and nodemat.py , change the path of step 2. 

att.mat and Wei.mat are used for function embedding.