Bit

  • Import can read any file as a sequence of single bits.
  • Export writes a list of 0s and 1s to a binary file.

BackgroundBackground

    Uniform sequence of bits.
    Binary data format.

Import and ExportImport and Export

  • Import["file","Bit"] imports an arbitrary file as a sequence of bits, returning a packed array of 0s and 1s.
  • Export["file",list,"Bit"] exports a list of 0s and 1s to a binary sequence of bits.
  • Import["file",{"Bit",elem}] or Import["file",elem ] imports the specified element from file.
  • Import["file",{"Bit",{elem1,elem2,}}] imports multiple elements.
  • See the reference pages for full general information on Import and Export.
  • ImportString and ExportString support the Bit 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 single bits (0 or 1)
  • By default, Import and Export use the element.
  • Import["file",{"Bit",n}] gives the n^(th) bit from file.
  • Export["file",list,"Bit"] pads list with zeros at the end if the number of bits to be exported is not a multiple of 8.

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 text string to a list of bits:

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

Convert a list of 0s and 1s:

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

Export automatically pads with 0s if necessary:

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