MATHEMATICA IMPORT/EXPORT FORMAT

# Real128

Uniform sequence of IEEE quad-precision numbers.
Binary data format.
• Import can read arbitrary binary data as a sequence of quad-precision numbers.
• Export can convert a list of arbitrary integers or reals to binary quad-precision numbers.

## Import and ExportImport and Export

• Import["file", "Real128"] imports any file as 128-bit IEEE quad-precision numbers, returning a packed array of real numbers.
• Export["file", list, "Real128"] exports a list of real numbers to file.
• Import["file", {"Real128", elem}] or Import["file", elem ] imports the specified element from file.
• Import["file", {"Real128", {elem1, elem2, ...}}] imports multiple elements.
• See the reference pages for full general information on Import and Export.
• ImportString and ExportString support the Real128 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 real numbers
• By default, Import and Export use the element.
• Import["file", {"Real128", n}] reads the n quad-precision number from file.
• Import returns Infinity for IEEE "infinity", and Indeterminate for IEEE "not-a-number".
• Trailing bytes are ignored if the size of the imported file is not a multiple of the data size.

## OptionsOptions

• General option:
•  ByteOrdering -1 what byte ordering to use
• Import option:
•  "HeaderBytes" 0 how many bytes to skip at the beginning of the file

## ExamplesExamplesopen allclose all

### Basic Examples (1)Basic Examples (1)

Convert a list of integers and reals to IEEE quad-precision numbers:

 Out[1]=

Convert the previous result back to Mathematica numbers:

 Out[2]=
New in 5.1 | Last modified in 6
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