helins.htm.math — io.helins/htm 0.0.0-alpha0

Miscellaneous math functions.

abs clj

(abs x)

Returns the absolute value.

durstenfeld-shuffle clj

(durstenfeld-shuffle rng collection)

Durstenfeld version of the Fisher-Yates shuffle.

factorial clj

(factorial n)

Computes a factorial.

fit-to-range clj

(fit-to-range value)

(fit-to-range max-value value)

(fit-to-range min-value max-value value)

Returns value' constrained to be between min-value and max-value inclusive.

Boundaries are 0 and 1 if not given.

mean clj

(mean sq)

Computes the mean of a sequence.

min-max-normalization clj

(min-max-normalization min-value max-value value)

Normalizes a numerical value between min-value and max-value.

Values out of range are treated as extreme values.

n-combinations clj

(n-combinations n k)

Counts the number of combinations of n choose k.

random-int clj

(random-int rng max-int)

(random-int rng min-int max-int)

Using a given random number generator for numbers between 0 (inclusive) and 1 (exclusive), generates an integer between min-int (inclusive) and max-int (exclusive).

reservoir-sample-ints clj

(reservoir-sample-ints rng max-int n-sample)

(reservoir-sample-ints rng min-int max-int n-sample)

Randomly samples n-sample integers between min-int (inclusive, defaults to 0) and max-int (exclusive).

round clj

(round x)

Rounds a number.

wrap-to-range clj

(wrap-to-range value)

(wrap-to-range max-value value)

(wrap-to-range min-value max-value value)

Like fit-to-range but the value is wrapped as if the range was cyclic.

Ex. (wrap-to-range 0 10 -3) => 6