Module Float.ArrayLabels

Contents

Instructions: Use this module in your project

In the IDE (CLion, Visual Studio Code, Xcode, etc.) you use for your DkSDK project:

  1. Add the following to your project's dependencies/CMakeLists.txt:

    Copy
    DkSDKProject_DeclareAvailable(ocaml
        CONSTRAINT "= 4.14.0"
        FINDLIBS str unix runtime_events threads dynlink)
    DkSDKProject_MakeAvailable(ocaml)
  2. Add the Findlib::ocaml library to any desired targets in src/*/CMakeLists.txt:

    Copy
    target_link_libraries(YourPackage_YourLibraryName
         # ... existing libraries, if any ...
         Findlib::ocaml)
  3. Click your IDE's Build button

Not using DkSDK?

FIRST, do one or all of the following:

  1. Run:

    Copy
    opam install ocaml.4.14.0
  2. Edit your dune-project and add:

    Copy
    (package
      (name YourExistingPackage)
      (depends
      ; ... existing dependenices ...
      (ocaml (>= 4.14.0))))

    Then run:

    Copy
    dune build *.opam # if this fails, run: dune build
  3. Edit your <package>.opam file and add:

    Copy
    depends: [
      # ... existing dependencies ...
      "ocaml" {>= "4.14.0"}
    ]

    Then run:

    Copy
    opam install . --deps-only

FINALLY, add the library to any desired (library)and/or (executable) targets in your **/dune files:

Copy
(library
  (name YourLibrary)
  ; ... existing library options ...
  (libraries
    ; ... existing libraries ...
    ))

(executable
  (name YourExecutable)
  ; ... existing executable options ...
  (libraries
    ; ... existing libraries ...
    ))
type t`` = floatarray

The type of float arrays with packed representation.

  • since 4.08.0
vallength :t -> int

Return the length (number of elements) of the given floatarray.

valget :t ->``int-> float

get a n returns the element number n of floatarray a.

  • raises Invalid_argument

    if n is outside the range 0 to (length a - 1).

valset :t ->``int->``float-> unit

set a n x modifies floatarray a in place, replacing element number n with x.

  • raises Invalid_argument

    if n is outside the range 0 to (length a - 1).

valmake : ``int->``float-> t

make n x returns a fresh floatarray of length n, initialized with x.

  • raises Invalid_argument

    if n < 0 or n > Sys.max_floatarray_length.

valcreate : ``int-> t

create n returns a fresh floatarray of length n, with uninitialized data.

  • raises Invalid_argument

    if n < 0 or n > Sys.max_floatarray_length.

valinit : ``int->``f:``(``int->float)``-> t

init n ~f returns a fresh floatarray of length n, with element number i initialized to the result of f i. In other terms, init n ~f tabulates the results of f applied to the integers 0 to n-1.

  • raises Invalid_argument

    if n < 0 or n > Sys.max_floatarray_length.

valappend :t -> t -> t

append v1 v2 returns a fresh floatarray containing the concatenation of the floatarrays v1 and v2.

  • raises Invalid_argument

    if length v1 + length v2 > Sys.max_floatarray_length.

valconcat :tlist``-> t

Same as append, but concatenates a list of floatarrays.

valsub :t ->``pos:int->``len:int-> t

sub a ~pos ~len returns a fresh floatarray of length len, containing the elements number pos to pos + len - 1 of floatarray a.

  • raises Invalid_argument

    if pos and len do not designate a valid subarray of a; that is, if pos < 0, or len < 0, or pos + len > length a.

valcopy :t -> t

copy a returns a copy of a, that is, a fresh floatarray containing the same elements as a.

valfill :t ->``pos:int->``len:int->``float-> unit

fill a ~pos ~len x modifies the floatarray a in place, storing x in elements number pos to pos + len - 1.

  • raises Invalid_argument

    if pos and len do not designate a valid subarray of a.

val blit : ``src:t ->``src_pos:int-> ``dst:t ->``dst_pos:int->``len:int-> unit

blit ~src ~src_pos ~dst ~dst_pos ~len copies len elements from floatarray src, starting at element number src_pos, to floatarray dst, starting at element number dst_pos. It works correctly even if src and dst are the same floatarray, and the source and destination chunks overlap.

  • raises Invalid_argument

    if src_pos and len do not designate a valid subarray of src, or if dst_pos and len do not designate a valid subarray of dst.

valto_list :t -> ``float list

to_list a returns the list of all the elements of a.

valof_list : ``float list``-> t

of_list l returns a fresh floatarray containing the elements of l.

  • raises Invalid_argument

    if the length of l is greater than Sys.max_floatarray_length.

Iterators

valiter : ``f:``(``float->unit)``-> t -> unit

iter ~f a applies function f in turn to all the elements of a. It is equivalent to f a.(0); f a.(1); ...; f a.(length a - 1); ().

valiteri : ``f:``(``int->``float->unit)``-> t -> unit

Same as iter, but the function is applied with the index of the element as first argument, and the element itself as second argument.

valmap : ``f:``(``float->float)``-> t -> t

map ~f a applies function f to all the elements of a, and builds a floatarray with the results returned by f.

valmapi : ``f:``(``int->``float->float)``-> t -> t

Same as map, but the function is applied to the index of the element as first argument, and the element itself as second argument.

val fold_left : ``f:``('a ->``float-> 'a)`` -> ``init:'a -> t -> 'a

fold_left ~f x ~init computes f (... (f (f x init.(0)) init.(1)) ...) init.(n-1), where n is the length of the floatarray init.

valfold_right : ``f:``(``float-> 'a -> 'a)`` -> t -> ``init:'a -> 'a

fold_right f a init computes f a.(0) (f a.(1) ( ... (f a.(n-1) init) ...)), where n is the length of the floatarray a.

Iterators on two arrays

valiter2 : ``f:``(``float->``float->unit)``-> t -> t -> unit

Array.iter2 ~f a b applies function f to all the elements of a and b.

  • raises Invalid_argument

    if the floatarrays are not the same size.

valmap2 : ``f:``(``float->``float->float)``-> t -> t -> t

map2 ~f a b applies function f to all the elements of a and b, and builds a floatarray with the results returned by f: [| f a.(0) b.(0); ...; f a.(length a - 1) b.(length b - 1)|].

  • raises Invalid_argument

    if the floatarrays are not the same size.

Array scanning

valfor_all : ``f:``(``float->bool)``-> t -> bool

for_all ~f [|a1; ...; an|] checks if all elements of the floatarray satisfy the predicate f. That is, it returns (f a1) && (f a2) && ... && (f an).

valexists : ``f:``(``float->bool)``-> t -> bool

exists f [|a1; ...; an|] checks if at least one element of the floatarray satisfies the predicate f. That is, it returns (f a1) || (f a2) || ... || (f an).

valmem : ``float-> ``set:t -> bool

mem a ~set is true if and only if there is an element of set that is structurally equal to a, i.e. there is an x in set such that compare a x = 0.

valmem_ieee : ``float-> ``set:t -> bool

Same as mem, but uses IEEE equality instead of structural equality.

Sorting

valsort : ``cmp:``(``float->``float->int)``-> t -> unit

Sort a floatarray in increasing order according to a comparison function. The comparison function must return 0 if its arguments compare as equal, a positive integer if the first is greater, and a negative integer if the first is smaller (see below for a complete specification). For example, Stdlib.compare is a suitable comparison function. After calling sort, the array is sorted in place in increasing order. sort is guaranteed to run in constant heap space and (at most) logarithmic stack space.

The current implementation uses Heap Sort. It runs in constant stack space.

Specification of the comparison function: Let a be the floatarray and cmp the comparison function. The following must be true for all x, y, z in a :

  • cmp x y > 0 if and only if cmp y x < 0
  • if cmp x y >= 0 and cmp y z >= 0 then cmp x z >= 0

When sort returns, a contains the same elements as before, reordered in such a way that for all i and j valid indices of a :

  • cmp a.(i) a.(j) >= 0 if and only if i >= j
valstable_sort : ``cmp:``(``float->``float->int)``-> t -> unit

Same as sort, but the sorting algorithm is stable (i.e. elements that compare equal are kept in their original order) and not guaranteed to run in constant heap space.

The current implementation uses Merge Sort. It uses a temporary floatarray of length n/2, where n is the length of the floatarray. It is usually faster than the current implementation of sort.

valfast_sort : ``cmp:``(``float->``float->int)``-> t -> unit

Same as sort or stable_sort, whichever is faster on typical input.

Float arrays and Sequences

valto_seq :t ->``floatSeq.t

Iterate on the floatarray, in increasing order. Modifications of the floatarray during iteration will be reflected in the sequence.

valto_seqi :t ->``(int * float)``Seq.t

Iterate on the floatarray, in increasing order, yielding indices along elements. Modifications of the floatarray during iteration will be reflected in the sequence.

valof_seq : ``floatSeq.t -> t

Create an array from the generator.

valmap_to_array : ``f:``(``float-> 'a)`` -> t -> 'a array

map_to_array ~f a applies function f to all the elements of a, and builds an array with the results returned by f: [| f a.(0); f a.(1); ...; f a.(length a - 1) |].

val map_from_array : ``f:``('a ->float)``-> 'aarray``-> t

map_from_array ~f a applies function f to all the elements of a, and builds a floatarray with the results returned by f.

More from the DkSDK Book

    1. DkSDK
      1. Package capnp
        1. Module Capnp
          1. Module Capnp.Array
          1. Module Capnp.BytesStorage
          1. Module Capnp.Codecs
          1. Module Capnp.Message
          1. Module Capnp.MessageSig
            1. Module type MessageSig.MESSAGE
            1. Module type MessageSig.S
              1. Module S.ListStorage
              1. Module S.Message
              1. Module S.Object
              1. Module S.Segment
              1. Module S.Slice
              1. Module S.StructStorage
            1. Module type MessageSig.SEGMENT
            1. Module type MessageSig.SLICE
          1. Module Capnp.RPC
              1. Module type RPC.S
                1. Module S.Capability
                1. Module S.ListStorage
                1. Module S.Message
                1. Module S.Object
                1. Module S.Segment
                1. Module S.Service
                1. Module S.Slice
                1. Module S.StructRef
                1. Module S.StructStorage
                1. Module S.Untyped
              1. Module M.ListStorage
              1. Module M.Message
              1. Module M.Object
              1. Module M.Segment
              1. Module M.Slice
              1. Module M.StructStorage
          1. Module Capnp.Runtime
        1. Module Capnp_unix
          1. Module Capnp_unix.IO
      1. Package cmdliner
        1. Module Cmdliner
          1. Module Cmdliner.Arg
          1. Module Cmdliner.Cmd
          1. Module Cmdliner.Manpage
          1. Module Cmdliner.Term
        1. Module Cmdliner_arg
        1. Module Cmdliner_base
        1. Module Cmdliner_cline
        1. Module Cmdliner_cmd
        1. Module Cmdliner_docgen
        1. Module Cmdliner_eval
        1. Module Cmdliner_info
          1. Module Cmdliner_info.Arg
          1. Module Cmdliner_info.Cmd
          1. Module Cmdliner_info.Env
          1. Module Cmdliner_info.Eval
          1. Module Cmdliner_info.Exit
        1. Module Cmdliner_manpage
        1. Module Cmdliner_msg
        1. Module Cmdliner_term
        1. Module Cmdliner_term_deprecated
        1. Module Cmdliner_trie
      1. Package fmt
        1. Module Fmt
          1. Module Fmt.Dump
        1. Module Fmt_cli
        1. Module Fmt_tty
      1. Package logs
        1. Module Logs
        1. Module Logs_cli
        1. Module Logs_fmt
        1. Module Logs_lwt
        1. Module Logs_threaded
      1. Package lwt
        1. Module Lwt
          1. Module Lwt.Infix
          1. Module Lwt.Let_syntax
          1. Module Lwt.Syntax
        1. Module Lwt_bytes
        1. Module Lwt_condition
        1. Module Lwt_config
        1. Module Lwt_engine
          1. Module Lwt_engine.Ev_backend
          1. Module Lwt_engine.Versioned
        1. Module Lwt_features
        1. Module Lwt_fmt
        1. Module Lwt_gc
        1. Module Lwt_io
          1. Module Lwt_io.BE
          1. Module Lwt_io.LE
          1. Module Lwt_io.Versioned
        1. Module Lwt_list
        1. Module Lwt_main
          1. Module Lwt_main.Enter_iter_hooks
          1. Module Lwt_main.Exit_hooks
          1. Module Lwt_main.Leave_iter_hooks
        1. Module Lwt_mutex
        1. Module Lwt_mvar
        1. Module Lwt_pool
        1. Module Lwt_pqueue
          1. Module Lwt_pqueue.Make
        1. Module Lwt_preemptive
        1. Module Lwt_process
        1. Module Lwt_result
          1. Module Lwt_result.Infix
          1. Module Lwt_result.Let_syntax
          1. Module Lwt_result.Syntax
        1. Module Lwt_seq
        1. Module Lwt_sequence
        1. Module Lwt_stream
        1. Module Lwt_switch
        1. Module Lwt_sys
        1. Module Lwt_throttle
          1. Module Lwt_throttle.Make
        1. Module Lwt_timeout
        1. Module Lwt_unix
          1. Module Lwt_unix.IO_vectors
          1. Module Lwt_unix.LargeFile
          1. Module Lwt_unix.Versioned
      1. Package mtime
        1. Module Mtime
          1. Module Mtime.Span
        1. Module Mtime_clock
      1. Package ocaml
        1. Module Bigarray
        1. Module Condition
        1. Module Dynlink
        1. Module Event
        1. Module Mutex
        1. Module Profiling
        1. Module Semaphore
          1. Module Semaphore.Binary
          1. Module Semaphore.Counting
        1. Module Stdlib
          1. Module Stdlib.Arg
          1. Module Stdlib.Array
          1. Module Stdlib.ArrayLabels
          1. Module Stdlib.Atomic
          1. Module Stdlib.Bigarray
          1. Module Stdlib.Bool
          1. Module Stdlib.Buffer
          1. Module Stdlib.Bytes
          1. Module Stdlib.BytesLabels
          1. Module Stdlib.Callback
          1. Module Stdlib.Char
          1. Module Stdlib.Complex
          1. Module Stdlib.Digest
          1. Module Stdlib.Either
          1. Module Stdlib.Ephemeron
          1. Module Stdlib.Filename
          1. Module Stdlib.Float
            1. ...
            1. Module Float.ArrayLabels
            1. ...
          1. Module Stdlib.Format
          1. Module Stdlib.Fun
          1. Module Stdlib.Gc
          1. Module Stdlib.Genlex
          1. Module Stdlib.Hashtbl
              1. Module type Hashtbl.HashedType
              1. Module type Hashtbl.S
              1. Module type Hashtbl.SeededHashedType
              1. Module type Hashtbl.SeededS
          1. Module Stdlib.In_channel
          1. Module Stdlib.Int
          1. Module Stdlib.Int32
          1. Module Stdlib.Int64
          1. Module Stdlib.LargeFile
          1. Module Stdlib.Lazy
          1. Module Stdlib.Lexing
          1. Module Stdlib.List
          1. Module Stdlib.ListLabels
          1. Module Stdlib.Map
              1. Module type Map.OrderedType
              1. Module type Map.S
          1. Module Stdlib.Marshal
          1. Module Stdlib.MoreLabels
          1. Module Stdlib.Nativeint
          1. Module Stdlib.Obj
          1. Module Stdlib.Oo
          1. Module Stdlib.Option
          1. Module Stdlib.Out_channel
          1. Module Stdlib.Parsing
          1. Module Stdlib.Pervasives
          1. Module Stdlib.Printexc
          1. Module Stdlib.Printf
          1. Module Stdlib.Queue
          1. Module Stdlib.Random
          1. Module Stdlib.Result
          1. Module Stdlib.Scanf
          1. Module Stdlib.Seq
          1. Module Stdlib.Set
              1. Module type Set.OrderedType
              1. Module type Set.S
          1. Module Stdlib.Stack
          1. Module Stdlib.StdLabels
          1. Module Stdlib.Stream
          1. Module Stdlib.String
          1. Module Stdlib.StringLabels
          1. Module Stdlib.Sys
          1. Module Stdlib.Uchar
          1. Module Stdlib.Unit
          1. Module Stdlib.Weak
              1. Module type Weak.S
        1. Module Str
        1. Module Thread
        1. Module ThreadUnix
        1. Module Topdirs
        1. Module Unix
          1. Module Unix.LargeFile
        1. Module UnixLabels
          1. Module UnixLabels.LargeFile
          1. Module EndianBigstring
              1. Module type EndianBigstring.EndianBigstringSig
          1. Module EndianBytes
              1. Module type EndianBytes.EndianBytesSig
          1. Module EndianString
              1. Module type EndianString.EndianStringSig
      1. Package
      1. Package result
        1. Module Result
      1. Package stdint
        1. Module Stdint
          1. Module Stdint.Int128
          1. Module Stdint.Int16
          1. Module Stdint.Int24
          1. Module Stdint.Int32
          1. Module Stdint.Int40
          1. Module Stdint.Int48
          1. Module Stdint.Int56
          1. Module Stdint.Int64
          1. Module Stdint.Int8
          1. Module Stdint.Uint128
          1. Module Stdint.Uint16
          1. Module Stdint.Uint24
          1. Module Stdint.Uint32
          1. Module Stdint.Uint40
          1. Module Stdint.Uint48
          1. Module Stdint.Uint56
          1. Module Stdint.Uint64
          1. Module Stdint.Uint8