Rig is a small program for the calculation of Elo ratings and the use of these to predict the outcomes. Whilst it is geared toward tennis data, it should be general enough to use on all sorts of data. It is named after the Norse god who was said to be able to see the future.
Simple calculation of elo ratings from a list of outcomes
rig -i input_file
This list data must be formatted either with outcomes as
Player One 2 - 1 Player Two
Or as just the names
Winner - Loser
Tennis results are often distributed as tree like data rather than as a list of outcomes. Rig can deal with this data directly as
rig --itree -i input_file
Or it can transform this data to list format (useful for building large datasets)
rig -itree -i input_file --olist -o output_file
The expected winner out of two players can be calculated via
rig -i input_file --ocomp "A. Murray" "S. Johnson"
As an extension to the standard Elo algorithm, rig can use the binomial distribution to predict outcomes.
Hopefully this will be more accurate than the standard algorithm, this has not been tested.
This mode can activated by the -b flag, i.e.
rig -i input_file -b
This mode also effect the output for --ocomp
Rig has been built successfully with Clang and GCC but older versions of GCC may fail to work correctly due to an incomplete libstdc++.
To check if rig will work correctly run
make test
./rig_test
In windows cmd you will need to run rig_test instead of ./rig_test.
To then build rig, run
make
If the make file should fail for any reason,
to build the testing application the files in the ./tests/ directory and the files in ./src/ directory need to be compiled together.
The catch unit testing library also needs to be able to be found by your compiler.
Using gcc this looks like
g++ -std=c++11 -o rig_test -I/path/to/catch.hpp -I./include/ ./tests/*.cpp ./src/*.cpp
To build rig the files in ./src/ and ./rig.cpp need to be compiled together.
Using gcc this looks like
g++ -std=c++11 -o rig -I./include/ ./src/*.cpp ./rig.cpp