It can be downloaded from https://drive.google.com/file/d/1_sE65oveGpzRdCcExBmUaNG982lUB-Cx/view?usp=drive_link
Place the downloaded file in the project directory, then unzip it (and rename it).
tar xzvf 18graphs.tar.gz
mv 18graphs graphs
Run data.py first to get a sparse matrix of am
Run create_dense_matrix.py to get random generated dense maxtrix