hex ← ##.hexf num ⍝ IEEE 754/854 binary floating point. num ← ##.hexf hex Converts between numbers and character vectors of their IEEE 754-2008 and 854- 2008 double-precision binary floating-point representation. The hexadecimal character vector is in big-endian format with the sign and exp- onent in the left-most 12 bits. hexf 3 ⍝ sign 0, exponent 400, (elided 1) mantissa binary 10000 ... 4008000000000000 hexf hexf 3 ⍝ (round-trip). 3 Hexf accomodates arrays of any rank and depth. NB: This coding of hexf subsumes function "decf", which has been withdrawn. NB: With code from Jay Foad, this version includes support for 128-bit Decimal Floating point. See: http://en.wikipedia.org/wiki/IEEE_754-2008 for details. Examples: nmat←÷2 3⍴⍳6 ⍝ simple numeric array. nmat ⍝ display of array. 1 0.5 0.3333333333 0.25 0.2 0.1666666667 hexf nmat ⍝ hex display of floating array. 3FF0000000000000 3FE0000000000000 3FD5555555555555 3FD0000000000000 3FC999999999999A 3FC5555555555555 nmat ≡ hexf hexf nmat ⍝ check round-trip. 1 ⎕FR←1287 ⍝ Decimal Floating Point IEEE 854 hexf ○1 ⍝ Pi as 128-bit decimal floating-point. 2DFFCC1AEB53B3FBB4E262D0DAB5E683 See also: hex Back to: contents Back to: Workspaces