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Diffstat (limited to 'libs/subcircuit/README')

-rw-r--r-- | libs/subcircuit/README | 43 |

1 files changed, 34 insertions, 9 deletions

diff --git a/libs/subcircuit/README b/libs/subcircuit/README index 5c8a8a9e..d1bdb1f6 100644 --- a/libs/subcircuit/README +++ b/libs/subcircuit/README @@ -14,20 +14,12 @@ Introduction This is a library that implements a modified Ullmann Subgraph Isomorphism Algorithm with additional features aimed at working with coarse grain logic -networks. +networks. It also contains a simple frequent subcircuit mining algorithm. A simple command line tool that exposes the features of the library is also included. -Under-Construction Warning --------------------------- - -This work is under constructions. It is likely that they are bugs in the -library that need fixing. Feel free to contact me at clifford@clifford.at -if you have found a bug. - - C++11 Warning ------------- @@ -97,6 +89,9 @@ Algorithm are provided by the library. * Support for finding only non-overlapping matches. + * A simple miner for frequent subcircuts that operates on the same circuit + description format. + * The public API of the library is using std::string identifiers for nodes, node types and ports. Internally the costly part of the algorithm is only using integer values, thus speeding up the @@ -328,6 +323,32 @@ bool userCheckSolution(result): ignored. The default implementation always returns true. +Mining for frequent SubCircuits +------------------------------- + +The solver also contains a miner for frequent subcircuits. The following code +fragment will find all frequent subcircuits with at least minNodes nodes and +at most maxNodes nodes that occurs at least minMatches times: + + std::vector<SubCircuit::Solver::MineResult> results; + mySolver.mine(results, minNodes, maxNodes, minMatches); + +The miner works by finding frequent pairs of nodes and then combining them +to larger subcircuits. Because of this incremental strategy the miner only +works as expected on graphs with markAllExtern() set. + +The mine() method has an optional fifth parameter that limits the number +of matches counted in one graph. This can be useful when mining for circuits +that are found in at least a number of graphs. E.g. the following call +would find all subcircuits with 5 nodes that are found in at least 7 of +the registered graphs: + + mySolver.mine(results, 5, 5, 7, 1); + +Note that this miner is not very efficient and therefore its use is not +recommended for large circuits. + + Debugging --------- @@ -420,6 +441,10 @@ The following commands can be used in scshell outside a graph ... endgraph block Call Solver::solve(). The <allow_overlap> must be "1" or "true" for true and "0" or "false" for false. + mine <min_nodes> <max_nodes> <min_matches> [<limit_matches_per_graph>] + + Call Solver::mine(). + expect <number> Print all results so far since the last call to expect. Expect |