Integer8

  • Import can read any file as a sequence of signed 8-bit integers.
  • Export writes a list of integers in the range to a binary file.

BackgroundBackground

    Uniform sequence of signed 8-bit integers.
    Binary data format.

Import and ExportImport and Export

  • Import["file","Integer8"] imports an arbitrary file as a sequence of signed 8-bit integers, returning a packed array of integers in the range .
  • Export["file",list,"Integer8"] exports a list of integers in the range to a sequence of binary 8-bit integers.
  • Import["file",{"Integer8",elem}] or Import["file",elem ] imports the specified element from file.
  • Import["file",{"Integer8",{elem1,elem2,}}] imports multiple elements.
  • See the reference pages for full general information on Import and Export.
  • ImportString and ExportString support the Integer8 format.

ElementsElements

  • General Import elements:
  • "Elements" elements and options available in this file
    "Rules"full rules for each element and option
    "Options"rules for options, properties, and settings
  • Data representation element:
  • "Data"list of integers in the range
  • By default, Import and Export use the element.
  • Import["file",{"Integer8",n}] gives the n^(th) byte.
  • Trailing bytes are ignored if the size of the imported file is not a multiple of the data size.

OptionsOptions

  • Import option:
  • "HeaderBytes"0how many bytes to skip at the beginning of the file

ExamplesExamplesopen allclose all

Basic Examples  (1)Basic Examples  (1)

Convert a list of integers to a string representing binary 8-bit signed integers:

In[1]:=
Click for copyable input
Out[1]=

Convert the binary data back to an expression:

In[2]:=
Click for copyable input
Out[2]=

Import the same data, assuming it represents an array of unsigned 8-bit integers:

In[3]:=
Click for copyable input
Out[3]=
Introduced in 2004
(5.1)
| Updated in 2007
(6.0)