To create a json file of graphs for the list of examples, do the following.
* make sure all the graphs are listed in in the desired order in file_list.txt in subdirectories algorithms, graphs, and layered-graphs; one way to do this is `ls > file_list.txt` and then move the files around into the desired order
* do the following in all three subdirectories
```
../../../conversion-scripts/dir2index.py -F json -f "`cat file_list.txt`" "" > tmp.json
```
* move `algorithms/tmp.json` to `../../src/data/algorithms.json`
* Use a text editor to combine the two json files in `graphs` and `layered-graphs` into a single list and move the result as `../../src/data/graphs.json`
* delete the `tmp.json` files in `graphs`, `layered-graphs`, and the combined version, if any

If only a single or small number of files need to change, you can do, for example,
```
../../../conversion-scripts/dir2index.py -F json -f "file_1 file_2" "" > tmp.json
```
and then edit the appropriate json file in `../../../src/data/` to replace the entries for `file_1` and `file_2`