459 lines
6.4 KiB
HTML
459 lines
6.4 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of Bigarray.Array2</TITLE>
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</HEAD><BODY>
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<H1>Bigarray.Array2</H1>
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Section: OCaml library (3o)<BR>Updated: 2020-01-30<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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Bigarray.Array2 - Two-dimensional arrays.
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<A NAME="lbAC"> </A>
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<H2>Module</H2>
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Module Bigarray.Array2
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<A NAME="lbAD"> </A>
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<H2>Documentation</H2>
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<P>
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Module
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<B>Array2</B>
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<BR> :
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<B>sig end</B>
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Two-dimensional arrays. The
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<B>Array2</B>
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structure provides operations
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similar to those of
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<B>Bigarray.Genarray</B>
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, but specialized to the
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case of two-dimensional arrays.
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<P>
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<P>
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<P>
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<P>
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<P>
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<I>type </I>
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<B>('a, 'b, 'c)</B>
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<I>t </I>
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The type of two-dimensional Bigarrays whose elements have
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OCaml type
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<B>'a</B>
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, representation kind
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<B>'b</B>
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, and memory layout
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<B>'c</B>
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.
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<P>
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<P>
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<P>
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<I>val create </I>
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:
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<B>('a, 'b) Bigarray.kind -></B>
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<B>'c Bigarray.layout -> int -> int -> ('a, 'b, 'c) t</B>
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<P>
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<P>
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<B>Array2.create kind layout dim1 dim2</B>
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returns a new Bigarray of
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two dimension, whose size is
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<B>dim1</B>
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in the first dimension
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and
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<B>dim2</B>
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in the second dimension.
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<B>kind</B>
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and
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<B>layout</B>
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determine the array element kind and the array layout
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as described for
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<B>Bigarray.Genarray.create</B>
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.
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<P>
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<P>
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<P>
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<I>val dim1 </I>
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:
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<B>('a, 'b, 'c) t -> int</B>
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Return the first dimension of the given two-dimensional Bigarray.
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<P>
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<P>
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<P>
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<I>val dim2 </I>
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:
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<B>('a, 'b, 'c) t -> int</B>
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Return the second dimension of the given two-dimensional Bigarray.
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<I>val kind </I>
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:
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<B>('a, 'b, 'c) t -> ('a, 'b) Bigarray.kind</B>
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Return the kind of the given Bigarray.
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<P>
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<I>val layout </I>
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:
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<B>('a, 'b, 'c) t -> 'c Bigarray.layout</B>
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Return the layout of the given Bigarray.
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<P>
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<P>
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<P>
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<I>val change_layout </I>
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<B>('a, 'b, 'c) t -></B>
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<B>'d Bigarray.layout -> ('a, 'b, 'd) t</B>
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<P>
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<P>
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<B>Array2.change_layout a layout</B>
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returns a Bigarray with the
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specified
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<B>layout</B>
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, sharing the data with
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<B>a</B>
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(and hence having
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the same dimensions as
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<B>a</B>
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). No copying of elements is involved: the
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new array and the original array share the same storage space.
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The dimensions are reversed, such that
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<B>get v [| a; b |]</B>
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in
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C layout becomes
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<B>get v [| b+1; a+1 |]</B>
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in Fortran layout.
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<P>
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<P>
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<B>Since</B>
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4.06.0
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<P>
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<I>val size_in_bytes </I>
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:
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<B>('a, 'b, 'c) t -> int</B>
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<P>
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<B>size_in_bytes a</B>
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is the number of elements in
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<B>a</B>
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multiplied by
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<B>a</B>
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's
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<B>Bigarray.kind_size_in_bytes</B>
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.
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<P>
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<P>
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<B>Since</B>
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4.03.0
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<P>
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<P>
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<P>
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<I>val get </I>
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:
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<B>('a, 'b, 'c) t -> int -> int -> 'a</B>
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<P>
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<B>Array2.get a x y</B>
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, also written
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<B>a.{x,y}</B>
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,
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returns the element of
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<B>a</B>
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at coordinates (
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<B>x</B>
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,
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<B>y</B>
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).
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<B>x</B>
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and
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<B>y</B>
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must be within the bounds
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of
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<B>a</B>
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, as described for
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<B>Bigarray.Genarray.get</B>
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;
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otherwise,
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<B>Invalid_argument</B>
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is raised.
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<P>
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<P>
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<P>
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<I>val set </I>
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:
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<B>('a, 'b, 'c) t -> int -> int -> 'a -> unit</B>
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<P>
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<B>Array2.set a x y v</B>
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, or alternatively
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<B>a.{x,y} <- v</B>
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,
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stores the value
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<B>v</B>
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at coordinates (
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<B>x</B>
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,
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<B>y</B>
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) in
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<B>a</B>
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.
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<B>x</B>
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and
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<B>y</B>
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must be within the bounds of
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<B>a</B>
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,
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as described for
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<B>Bigarray.Genarray.set</B>
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;
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otherwise,
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<B>Invalid_argument</B>
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is raised.
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<P>
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<P>
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<P>
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<I>val sub_left </I>
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:
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<B>('a, 'b, Bigarray.c_layout) t -></B>
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<B>int -> int -> ('a, 'b, Bigarray.c_layout) t</B>
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<P>
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Extract a two-dimensional sub-array of the given two-dimensional
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Bigarray by restricting the first dimension.
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See
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<B>Bigarray.Genarray.sub_left</B>
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for more details.
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<B>Array2.sub_left</B>
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applies only to arrays with C layout.
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<P>
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<P>
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<P>
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<I>val sub_right </I>
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<B>('a, 'b, Bigarray.fortran_layout) t -></B>
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<B>int -> int -> ('a, 'b, Bigarray.fortran_layout) t</B>
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<P>
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Extract a two-dimensional sub-array of the given two-dimensional
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Bigarray by restricting the second dimension.
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See
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<B>Bigarray.Genarray.sub_right</B>
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for more details.
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<B>Array2.sub_right</B>
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applies only to arrays with Fortran layout.
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<P>
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<P>
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<P>
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<I>val slice_left </I>
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<B>('a, 'b, Bigarray.c_layout) t -></B>
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<B>int -> ('a, 'b, Bigarray.c_layout) Bigarray.Array1.t</B>
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<P>
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Extract a row (one-dimensional slice) of the given two-dimensional
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Bigarray. The integer parameter is the index of the row to
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extract. See
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<B>Bigarray.Genarray.slice_left</B>
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for more details.
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<B>Array2.slice_left</B>
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applies only to arrays with C layout.
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<P>
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<P>
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<P>
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<I>val slice_right </I>
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<B>('a, 'b, Bigarray.fortran_layout) t -></B>
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<B>int -> ('a, 'b, Bigarray.fortran_layout) Bigarray.Array1.t</B>
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<P>
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Extract a column (one-dimensional slice) of the given
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two-dimensional Bigarray. The integer parameter is the
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index of the column to extract. See
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<B>Bigarray.Genarray.slice_right</B>
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for more details.
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<B>Array2.slice_right</B>
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applies only to arrays
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with Fortran layout.
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<P>
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<P>
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<P>
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<I>val blit </I>
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<B>('a, 'b, 'c) t -> ('a, 'b, 'c) t -> unit</B>
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<P>
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Copy the first Bigarray to the second Bigarray.
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See
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<B>Bigarray.Genarray.blit</B>
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for more details.
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<P>
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<P>
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<P>
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<I>val fill </I>
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<B>('a, 'b, 'c) t -> 'a -> unit</B>
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<P>
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Fill the given Bigarray with the given value.
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See
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<B>Bigarray.Genarray.fill</B>
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for more details.
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<P>
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<P>
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<P>
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<I>val of_array </I>
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<B>('a, 'b) Bigarray.kind -></B>
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<B>'c Bigarray.layout -> 'a array array -> ('a, 'b, 'c) t</B>
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<P>
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Build a two-dimensional Bigarray initialized from the
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given array of arrays.
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<P>
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<P>
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<P>
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<I>val unsafe_get </I>
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:
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<B>('a, 'b, 'c) t -> int -> int -> 'a</B>
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<P>
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Like
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<B>Bigarray.Array2.get</B>
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, but bounds checking is not always
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performed.
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<P>
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<P>
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<P>
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<I>val unsafe_set </I>
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:
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<B>('a, 'b, 'c) t -> int -> int -> 'a -> unit</B>
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<P>
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Like
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<B>Bigarray.Array2.set</B>
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, but bounds checking is not always
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performed.
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<P>
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<P>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">Module</A><DD>
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<DT id="3"><A HREF="#lbAD">Documentation</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:36 GMT, March 31, 2021
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</BODY>
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</HTML>
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