lacaml 9.3.1 · OCaml Package

type t = vec

Vector operations

Creation of vectors

val random : 
  ?rnd_state:Random.State.t ->
  ?re_from:float ->
  ?re_range:float ->
  ?im_from:float ->
  ?im_range:float ->
  int ->
  vec

random ?rnd_state ?re_from ?re_range ?im_from ?im_range n

returns
a vector of size n initialized with random elements sampled uniformly from re_range and im_range starting at re_from and im_from for real and imaginary numbers respectively. A random state rnd_state can be passed.

parameter rnd_state
default = Random.get_state ()

parameter re_from
default = -1.0

parameter re_range
default = 2.0

parameter im_from
default = -1.0

parameter im_range
default = 2.0

type unop =
  ?n:int ->
  ?ofsy:int ->
  ?incy:int ->
  ?y:vec ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  vec

type binop =
  ?n:int ->
  ?ofsz:int ->
  ?incz:int ->
  ?z:vec ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  ?ofsy:int ->
  ?incy:int ->
  vec ->
  vec

Creation/conversion of vectors and dimension accessor

val create : int -> vec

create n

returns
a vector with n rows (not initialized).

val make : int -> Complex.t -> vec

make n x

returns
a vector with n rows initialized with value x.

val make0 : int -> vec

make0 n x

returns
a vector with n rows initialized with the zero element.

val init : int -> (int -> Complex.t) -> vec

init n f

returns
a vector containing n elements, where each element at position i is initialized by the result of calling f i.

val of_array : Complex.t array -> vec

of_array ar

returns
a vector initialized from array ar.

val to_array : vec -> Complex.t array

to_array v

returns
an array initialized from vector v.

val of_list : Complex.t list -> vec

of_list l

returns
a vector initialized from list l.

val to_list : vec -> Complex.t list

to_list v

returns
a list initialized from vector v.

val append : vec -> vec -> vec

append v1 v2

returns
the vector resulting from appending vector v2 to v1.

val concat : vec list -> vec

concat vs

returns
the concatenation of vectors vs.

val empty : vec

empty, the empty vector.

val linspace : ?y:vec -> Complex.t -> Complex.t -> int -> vec

linspace ?z a b n

returns
the vector y overwritten with n linearly spaced points between and including a and b.

parameter y
default = fresh vector of dim n

val logspace : ?y:vec -> Complex.t -> Complex.t -> ?base:float -> int -> vec

logspace ?z a b base n

returns
the vector y overwritten with n points logarithmically spaced using base b between and including base ** a and base ** b.

parameter y
default = fresh vector of dim n

parameter base
default = 10.0

val dim : vec -> int

dim x

returns
the dimension of vector x.

val has_zero_dim : vec -> bool

has_zero_dim vec checks whether vector vec has a dimension of size zero. In this case it cannot contain data.

Iterators over vectors

val map : 
  (Complex.t -> Complex.t) ->
  ?n:int ->
  ?ofsy:int ->
  ?incy:int ->
  ?y:vec ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  vec

map f ?n ?ofsx ?incx x

returns
a new vector resulting from the application of f to each element of x.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

parameter y
default = new vector with ofsy+(n-1)(abs incy) rows

parameter ofsx
default = 1

parameter incx
default = 1

val iter : 
  (Complex.t -> unit) ->
  ?n:int ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  unit

iter ?n ?ofsx ?incx f x applies function f in turn to all elements of vector x.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val iteri : 
  (int -> Complex.t -> unit) ->
  ?n:int ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  unit

iteri ?n ?ofsx ?incx f x same as iter but additionally passes the index of the element as first argument and the element itself as second argument.

val fold : 
  ('a -> Complex.t -> 'a) ->
  'a ->
  ?n:int ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  'a

fold f a ?n ?ofsx ?incx x is f (... (f (f a x.{ofsx}) x.{ofsx + incx}) ...) x.{ofsx + (n-1)*incx} if incx > 0 and the same in the reverse order of appearance of the x values if incx < 0.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

Operations on one vector

val rev : vec -> vec

rev x reverses vector x (non-destructive).

val max : ?n:int -> ?ofsx:int -> ?incx:int -> vec -> Complex.t

max ?n ?ofsx ?incx x computes the greater of the n elements in vector x (2-norm), separated by incx incremental steps. NaNs are ignored. If only NaNs are encountered, the negative infinity value will be returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val min : ?n:int -> ?ofsx:int -> ?incx:int -> vec -> Complex.t

min ?n ?ofsx ?incx x computes the smaller of the n elements in vector x (2-norm), separated by incx incremental steps. NaNs are ignored. If only NaNs are encountered, the infinity value will be returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val sort : 
  ?cmp:(Complex.t -> Complex.t -> int) ->
  ?decr:bool ->
  ?n:int ->
  ?ofsp:int ->
  ?incp:int ->
  ?p:(int, Bigarray.int_elt, Bigarray.fortran_layout) Bigarray.Array1.t ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  unit

sort ?cmp ?n ?ofsx ?incx x sorts the array x in increasing order according to the comparison function cmp.

parameter cmp
a function such that cmp a b < 0 if a is less than b, cmp a b = 0 if a equal b and cmp a b > 0 if a is greater than b for the desired order. Default: the usual order on floating point values or the lexicographic order on complex ones (a special routine makes it fast). Whatever the order you choose, NaNs (in any component for complex numbers) are considered larger than any other value (so they will be last, in no specified order, in the sorted vector). Therefore, NaN are never passed to cmp.

parameter p
if you pass a vector of size ofsp+(n - 1)(abs incp), the vector x will be unchanged and the permutation to sort it will be stored in p. Thus x.{p.{ofsp + (i-1) * incp}} will give the elements of x in increasing order. Default: no vector is provided.

parameter decr
sort in decreasing order (stays fast for the default cmp).

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsp
default = 1

parameter incp
default = 1

parameter ofsx
default = 1

parameter incx
default = 1

val fill : ?n:int -> ?ofsx:int -> ?incx:int -> vec -> Complex.t -> unit

fill ?n ?ofsx ?incx x a fills vector x with value a in the designated range.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val sum : ?n:int -> ?ofsx:int -> ?incx:int -> vec -> Complex.t

sum ?n ?ofsx ?incx x computes the sum of the n elements in vector x, separated by incx incremental steps.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val prod : ?n:int -> ?ofsx:int -> ?incx:int -> vec -> Complex.t

prod ?n ?ofsx ?incx x computes the product of the n elements in vector x, separated by incx incremental steps.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val add_const : Complex.t -> unop

add_const c ?n ?ofsy ?incy ?y ?ofsx ?incx x adds constant c to the n elements of vector x and stores the result in y, using incx and incy as incremental steps respectively. If y is given, the result will be stored in there using increments of incy, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsy
default = 1

parameter incy
default = 1

parameter y
default = fresh vector with ofsy+(n - 1)(abs incy) rows

parameter ofsx
default = 1

parameter incx
default = 1

val sqr_nrm2 : ?stable:bool -> ?n:int -> ?ofsx:int -> ?incx:int -> vec -> float

sqr_nrm2 ?stable ?n ?c ?ofsx ?incx x computes the square of the 2-norm (Euclidean norm) of vector x separated by incx incremental steps. If stable is true, this is equivalent to squaring the result of calling the BLAS-function nrm2, which avoids over- and underflow if possible. If stable is false (default), dot will be called instead for greatly improved performance.

parameter stable
default = false

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

val ssqr : ?n:int -> ?c:Complex.t -> ?ofsx:int -> ?incx:int -> vec -> Complex.t

ssqr ?n ?c ?ofsx ?incx x computes the sum of squared differences of the n elements in vector x from constant c, separated by incx incremental steps. Please do not confuse with sqr_nrm2! The current function behaves differently with complex numbers when zero is passed in for c. It computes the square for each entry then, whereas sqr_nrm2 uses the conjugate transpose in the product. The latter will therefore always return a real number.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter c
default = zero

parameter ofsx
default = 1

parameter incx
default = 1

val neg : unop

neg ?n ?ofsy ?incy ?y ?ofsx ?incx x negates n elements of the vector x using incx as incremental steps. If y is given, the result will be stored in there using increments of incy, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsy
default = 1

parameter incy
default = 1

parameter y
default = fresh vector with ofsy+(n - 1)(abs incy) rows

parameter ofsx
default = 1

parameter incx
default = 1

val reci : unop

reci ?n ?ofsy ?incy ?y ?ofsx ?incx x computes the reciprocal value of n elements of the vector x using incx as incremental steps. If y is given, the result will be stored in there using increments of incy, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsy
default = 1

parameter incy
default = 1

parameter y
default = fresh vector with ofsy+(n - 1)(abs incy) rows

parameter ofsx
default = 1

parameter incx
default = 1

Operations on two vectors

val add : binop

add ?n ?ofsz ?incz ?z ?ofsx ?incx x ?ofsy ?incy y adds n elements of vectors x and y elementwise, using incx and incy as incremental steps respectively. If z is given, the result will be stored in there using increments of incz, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsz
default = 1

parameter incz
default = 1

parameter z
default = fresh vector with ofsz+(n - 1)(abs incz) rows

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1

val sub : binop

sub ?n ?ofsz ?incz ?z ?ofsx ?incx x ?ofsy ?incy y subtracts n elements of vectors x and y elementwise, using incx and incy as incremental steps respectively. If z is given, the result will be stored in there using increments of incz, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsz
default = 1

parameter incz
default = 1

parameter z
default = fresh vector with ofsz+(n - 1)(abs incz) rows

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1

val mul : binop

mul ?n ?ofsz ?incz ?z ?ofsx ?incx x ?ofsy ?incy y multiplies n elements of vectors x and y elementwise, using incx and incy as incremental steps respectively. If z is given, the result will be stored in there using increments of incz, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsz
default = 1

parameter incz
default = 1

parameter z
default = fresh vector with ofsz+(n - 1)(abs incz) rows

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1

val div : binop

div ?n ?ofsz ?incz ?z ?ofsx ?incx x ?ofsy ?incy y divides n elements of vectors x and y elementwise, using incx and incy as incremental steps respectively. If z is given, the result will be stored in there using increments of incz, otherwise a fresh vector will be used. The resulting vector is returned.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsz
default = 1

parameter incz
default = 1

parameter z
default = fresh vector with ofsz+(n - 1)(abs incz) rows

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1

val zpxy : 
  ?n:int ->
  ?ofsz:int ->
  ?incz:int ->
  vec ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  ?ofsy:int ->
  ?incy:int ->
  vec ->
  unit

zpxy ?n ?ofsz ?incz z ?ofsx ?incx x ?ofsy ?incy y multiplies n elements of vectors x and y elementwise, using incx and incy as incremental steps respectively, and adds the result to and stores it in the specified range in z. This function is useful for convolutions.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsz
default = 1

parameter incz
default = 1

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1

val zmxy : 
  ?n:int ->
  ?ofsz:int ->
  ?incz:int ->
  vec ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  ?ofsy:int ->
  ?incy:int ->
  vec ->
  unit

zmxy ?n ?ofsz ?incz z ?ofsx ?incx x ?ofsy ?incy y multiplies n elements of vectors x and y elementwise, using incx and incy as incremental steps respectively, and substracts the result from and stores it in the specified range in z. This function is useful for convolutions.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsz
default = 1

parameter incz
default = 1

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1

val ssqr_diff : 
  ?n:int ->
  ?ofsx:int ->
  ?incx:int ->
  vec ->
  ?ofsy:int ->
  ?incy:int ->
  vec ->
  Complex.t

ssqr_diff ?n ?ofsx ?incx x ?ofsy ?incy y returns the sum of squared differences of n elements of vectors x and y, using incx and incy as incremental steps respectively.

parameter n
default = greater n s.t. ofsx+(n-1)(abs incx) <= dim x

parameter ofsx
default = 1

parameter incx
default = 1

parameter ofsy
default = 1

parameter incy
default = 1