Table 1. Connectivity rules present in a selection of languages and simulators.
X: The rule is supported, A: The rule is supported and it is possible to specify whether autapses are created or not, M: Ditto for multapses.
| NEST | PyNN | NetPyNN | NineML | |
|---|---|---|---|---|
| One-to-one | A | A | X | |
| All-to-all | A | A | X1 | X |
| Explicit connections | X3 | X | X | X |
| Pairwise Bernoulli | A | A | X1 | X |
| Random, fixed total number | AM | AM | ||
| Random, fixed in-degree | AM | AM | X2 | X |
| Random, fixed out-degree | AM | AM | X2 | X |
1. Autapses unconditionally included.
2. Neither autapses nor multapses are included.
3. Supported by passing lists to Connect and choosing the one_to_one rule.