Byte

  • Import can read any file as a sequence of unsigned 8-bit integers.
  • Export writes a list of integers in the range (0, 255) to a binary file.

BackgroundBackground

    Sequence of bytes.
    Raw binary format.
    Equivalent to the UnsignedInteger8 format.

Import and ExportImport and Export

  • Import["file","Byte"] imports any file, returning a packed array of integers in the range (0, 255).
  • Export["file",list,"Byte"] exports a list of integers in the range (0, 255) to file.
  • Import["file",{"Byte",elem}] or Import["file",elem ] imports the specified element from file.
  • Import["file",{"Byte",{elem1,elem2,}}] imports multiple elements.
  • See the reference pages for full general information on Import and Export.
  • ImportString and ExportString support the Byte 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 (0, 255)
  • By default, Import and Export use the element.
  • Import["file",{"Byte",n}] gives the n^(th) byte from file.

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 unsigned 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 8-bit characters:

In[3]:=
Click for copyable input
Out[3]=

Skip the first 10 bytes on Import:

In[4]:=
Click for copyable input
Out[4]=
Introduced in 2004
(5.1)
| Updated in 2007
(6.0)