bb4-math

Core math utilities used across bb4 projects: ranges and axis cut-points, interpolation, 1D functions, combinatorics, complex numbers, linear algebra helpers, and multi-dimensional arrays.

Using it

implementation 'com.barrybecker4:bb4-math:2.0.0'

See the releases page or Maven Central for newer versions.

What's inside

• MathUtil — GCD/LCM, factorial, combinations/permutations, log10/exp10, and shared epsilon constants
• Range — double-precision min/max range with extent, containment, and unit-scale mapping
• cutpoints — nicely rounded tick/label positions for a numeric range (CutPointGenerator, tight vs. loose labeling)
• interpolation — interpolate through an array of y-values (linear, cosine, cubic, Hermite, step)
• function — 1D function types (LinearFunction, LogFunction, ArrayFunction, PiecewiseFunction, Gaussian ErrorFunction, wave forms, invertibility helpers)
• combinatorics — memory-efficient iterators over combinations (Combinater) and permutations (Permuter)
• complex — complex numbers and ranges with arithmetic and exponentiation
• linear — N-dimensional Vector, linear utilities, and a conjugate-gradient solver for Ax = b
• multiarray — arbitrarily dimensioned arrays of doubles with multi-index ↔ flat-index mapping
• random — skewed Gaussian random numbers (SkewedRandom)

Building from source

See the Building bb4 Projects wiki.

License

MIT — see LICENSE.