#12 · Tipare

Approximate Entropy

Compara frecventa tiparelor de lungime m si m+1; aleator => entropie aproape maxima.

Intrare

n biti; m = lungimea blocului.

Statistica

ApEn = phi^m - phi^(m+1); chi^2 = 2n(ln2 - ApEn); p = igamc(2^(m-1), chi^2/2).

Decizie

p < alpha => regularitate, nealeator.

Minim recomandat

100 biti

Ruleaza

m (lungime bloc)alpha100 biti

API

curl -s https://rngtests.danielwagner.ro/api/run/approx-entropy \
  -H 'Content-Type: application/json' \
  -d '{"bits":"1100100100001111110110101010001000100001011010001100001000110100110001001100011001100010100010111000"}'