Tasks: Done And To Do

This page aims to be a handy reference not only of the work done but also of work pending for the next planned release. Users who want new features should submit patches to this page in the unclassified section of this document. Developers who want to lend a hand can grab tasks from this page. Everyone can see the progress which is being made.

The following is a list of items still TODO for Math. Contributions are welcome!

  • Fill Me In! With A High Priority Task
  • Fill Me In With A Medium Priority Task
  • Fill Me In With A Low Priority Task
  • Add confidence intervals to Univariate implementations.
  • Extend distribution framework to support discrete distributions and implement binomial and hypergeometric distributions.
  • Framework and implementation strategie(s) for finding roots or real-valued functions of one (real) variable.
  • Cubic spline interpolation.
  • Javadoc generation is still throwing warnings. Bring the Javadoc into compliance (i.e. reach zero warnings).
  • Clover tests show gaps in test path coverage. Get all tests to 100% coverage. Also improve test data and boundary conditions coverage.
  • CheckStyle with modified properties still shows many errors. Clean these up.
  • Develop user's guide following the package structure.
  • Additional performance and accuracy testing. If anyone is interested in helping out here, what we could really use is a wider selection of test cases for the core numerical functions and validation against either other packages (e.g. R for the statistical stuff), verified datasets, or experiments comparing implementions using floats to doubles.
  • Additional code review. Verify that the code matches the documentation and identify obvious inefficiencies or numerical problems. All feedback/suggestions for improvement/patches are welcome.
  • Finalize the contents of MathUtils and StatUtils. Suggest any additions -- ideally with patches -- to these utility classes.
  • Bivariate Regression, correlation.
  • Sampling from Collections
  • Add higher order moments to Univariate implementations.
  • Binomial coefficients -- incorporate an "exact" implementation that is limited to what can be stored in a long. Also provided double-valued implementation of binomial coefficients and their logs.
  • Add percentiles to stored Univariate implementations
  • Improve numerical accuracy of Univariate and BivariateRegression statistical computations
  • t-test statistic needs to be added and we should probably add the capability of actually performing t- and chi-square tests at fixed significance levels (.1, .05, .01, .001).
  • numerical approximation of the t- and chi-square distributions to enable user-supplied significance levels.
  • The RealMatrixImpl class is missing some key method implementations. The critical thing is solution of linear systems. We need to implement a numerically sound solution algorithm. This will enable inverse() and also support general linear regression.
  • Added double[] |-> double methods in StatUtils to take start indexes and length as parameters and delegate the current "full array" versions to these.