Real128

• 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 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.

ELEMENTS

• 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 "Data" 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.

OPTIONS

• General option:

ByteOrdering

-1

what byte ordering to use

• Import option:

"HeaderBytes"

0

how many bytes to skip at the beginning of the file

SEE ALSO

• Binary  Bit  Byte  Character8  Character16  Integer8  Integer16  Integer24  Integer32  Integer64  Integer128  UnsignedInteger8  UnsignedInteger16  UnsignedInteger24  UnsignedInteger32  UnsignedInteger64  UnsignedInteger128  Real32  Real64  Complex64  Complex128  Complex256  String

MORE ABOUT

• Binary Data

• Listing of All Formats

EXAMPLES

CLOSE ALL

Basic Examples

Convert a list of integers and reals to IEEE quad-precision numbers: In[1]:= Out[1]= Convert the previous result back to Mathematica numbers: In[2]:= Out[2]=