BinaryHypervectors

BinaryHypervector(ndim::Int)

Create a random binary hypervector with ndim dimensions.

BinaryHypervector(x::BitVector)

Create a BinaryHypervector by rounding an AbstractVector elementwise to 0 or >= 0.5.

Base.:*(x::BitVector, y::BitVector)

Binds two bit vectors. Equivalent to bind(x, y).

Base.:+(x::BitVector, y::BitVector)

Bundle two bit vectors. Equivalent to bundle(x, y).

bind(x, y)

Bind two vectors using XOR. Applied efficiently by exploiting the chunk structure of BitVectors.

Base.circshift(x::BinaryHypervector, n)

Permute the BinaryHypervector by performing the circular shift n bits to the right.

bundle(vecs...)

Bundle vectors using majority rule. Ties broken deterministically using the rule from Hannagan et al. (2011, CogSci).

hammingsimilarity(x, y)

Compute 1 minus the normalized Hamming distance between the vectors x and y. Uses chunk structure of BitVectors for speed.

sequence_encoding(seqlen, ndim=2^13)

Create correlated sequence encodings with seqlen elements. Each BinaryHypervector in the returned list is correlated with its immediate neighbors, but the correlation drops with distance.