1. git clone the repository (command: git clone https://github.com/MLDroid/subgraph2vec.git )
2. sudo run init.sh (installs gensim, modifies word2vec libraries to use radial skipgram (refer sec: 5.2.2 of the paper))
NOTE: no need to run init.sh on the sg2vec VM (it is already setup)

1. make sure the gensim package contains a softlink "word2vec_inner.so -> mod_word2vec_inner.so" (command: ls -l /usr/local/lib/python2.7/dist-packages/gensim/models)
2. make sure that the file named 'Annaword2vec.py' is present in /usr/local/lib/python2.7/dist-packages/gensim/models (command: ls /usr/local/lib/python2.7/dist-packages/gensim/models/Annaword2vec.py)
3. make sure that the version of gensim is 0.12.4 (command from the python prompt: import gensim;print gensim.__version__)

1. move to the folder "src-code" (command: cd src_code) (also make sure that kdd 2015 paper's (Deep Graph Kernels) datasets are available in '../kdd_datasets/dir_graphs/')
2. run dump_wl_kernel_sentences.py file to generate the weisfeiler-lehman kernel's rooted subgraphs from all the graphs in a given folder
   * syntax: python dump_wl_kernel_sentences.py <gexf/json graph_dir> <height of WL kernel> <num of cpu cores for multi-processing>
   * example: python dump_wl_kernel_sentences.py ../kdd_datasets/dir_graphs/mutag 4 8 (this will generate files with extension .WL4 that contain target and context subgraphs in every graph)
3. run sg2vec.py to generate embeddings for each of the subgraphs generated in step 2
   * syntax: python sg2vec.py <src_dir> <file_extension> <opfname_prefix> <embedding_dim> <iterations> <# of cpu cores>
   * example: python sg2vec.py ../kdd_datasets/dir_graphs/mutag WL4 mutag 32 100 8
   * this will generate the following two outputs:
      * i)  a gensim word2vec model containing embeddings for all the subgraphs in the "../models" folder
      * ii) a json dump of the python dictionary containg embeddings of subgraphs (format of the dictionary: key = subgraph, value = embedding)

@article{narayanansubgraph2vec,
  title={subgraph2vec: Learning Distributed Representations of Rooted Sub-graphs from Large Graphs},
  author={Narayanan, Annamalai and Chandramohan, Mahinthan and Chen, Lihui and Liu, Yang and Saminathan, Santhoshkumar}
}