Update 'README.md'

README.md

+The "src" folder is the source code of SAMI paper which has seen some minor changes 
+from the original received version.
+The "codes" folder is the folder containing the following files: 
+1.adjlisttext_tonxgraph.py: gets an adj. list as input file and gives out the visualized
+ graph
+2.mat_tonxgraph.py: gets a .mat file as input file and gives out the visualized graph
+3.mae.py: computes mae of two graphs given their .mat adj matrix file
+
+For using the source code you must pay attention to two files: "RunExpSrv8s" and 
+"MissingNodes_S8b". The first one is the function which sets up the files and 
+calls the main function i.e. "MissingNodes_S8b".
+
+
+For having your own dataset run on this code you should know the below variables:
+
+*RUNEXPSRV_8S.m
+1. num_missing_nodes_arr: number of randomly removed nodes on each iteration
+2. ds_*: array of node numbers of your input arr
+3. ds_str: dataset path as a string
+4. root_dir
+5. file_prefix: file name prefix of the input files
+
+*MISSINGNODES_S8B
+1. k: filename postfix for saving
+2. clusters_out: true and predicted graph saved as .mat file
+3. graphs_out: 4 graphs including {original, predicted, predicted permuted, 
+original permuted} as .mat file
+
+
+*grid dataset is run on the src code as an example