System Function DC: Difference between revisions

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{{BoxLine |<apll>R</apll> is a numeric array.}}
{{BoxLine |<apll>R</apll> is a numeric array.}}
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{{BoxEnd  |
<ul><li>For simple numeric (a.k.a. Hypercomplex 1-dimensional &mdash; BOOL, INT, APA, FLOAT, RAT, or VFP) <apll>R</apll> where the number of columns of <apll>R</apll> (call that <apll>NC</apll>) is <apll>1</apll>, <apll>2</apll>, <apll>4</apll>, or <apll>8</apll>, <apll>Z</apll> is the corresponding Hypercomplex array whose Hypercomplex dimension is the same as the number of columns of <apll>R</apll>, and whose shape is <apll>¯1↓⍴R</apll>.  That is, the values in the last coordinate of <apll>R</apll> are treated as the coefficients of a Hypercomplex number and <apll>Z</apll> is the corresponding Hypercomplex number.</li>
<ul><li>For simple numeric (a.k.a. Hypercomplex 1-dimensional &mdash; BOOL, INT, APA, FLOAT, RAT, or VFP) <apll>R</apll> where the number of columns of <apll>R</apll> (call that <apll>NC</apll>) is <apll>1</apll>, <apll>2</apll>, <apll>4</apll>, or <apll>8</apll>, <apll>Z</apll> is the corresponding Hypercomplex array whose Hypercomplex dimension is the same as the number of columns of <apll>R</apll>, and whose shape is <apll>¯1↓⍴R</apll>.  That is, the values in the last coordinate of <apll>R</apll> are treated as the coefficients of a Hypercomplex number and <apll>Z</apll> is the corresponding Hypercomplex number. '''This capability has been replaced by the [[Condense]] function (<apll>&lt;R</apll>).'''</li>
<li>For Hypercomplex 2-, 4-, or 8-dimensional <apll>R</apll>, <apll>Z</apll> is the corresponding simple array (INT, FLOAT, RAT, or VFP) with a new coordinate on the right consisting of the coefficients of the Hypercomplex numbers in <apll>R</apll>, and whose shape is <apll>(⍴R),NC</apll>.  That is, <apll>Z</apll> contains the coefficients of the Hypercomplex number <apll>R</apll>.</li></ul>}}
<li>For Hypercomplex 2-, 4-, or 8-dimensional <apll>R</apll>, <apll>Z</apll> is the corresponding simple array (INT, FLOAT, RAT, or VFP) with a new coordinate on the right consisting of the coefficients of the Hypercomplex numbers in <apll>R</apll>, and whose shape is <apll>(⍴R),NC</apll>.  That is, <apll>Z</apll> contains the coefficients of the Hypercomplex number <apll>R</apll>. '''This capability has been replaced by the [[Dilate]] function (<apll>&gt;R</apll>).'''</li></ul>}}
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Revision as of 17:33, 9 April 2017

This function is available in both monadic and dyadic forms.

Monadic Function

Z←⎕DC R converts R between the coefficients of a Hypercomplex number and the corresponding Hypercomplex number.
R is a numeric array.
  • For simple numeric (a.k.a. Hypercomplex 1-dimensional — BOOL, INT, APA, FLOAT, RAT, or VFP) R where the number of columns of R (call that NC) is 1, 2, 4, or 8, Z is the corresponding Hypercomplex array whose Hypercomplex dimension is the same as the number of columns of R, and whose shape is ¯1↓⍴R. That is, the values in the last coordinate of R are treated as the coefficients of a Hypercomplex number and Z is the corresponding Hypercomplex number. This capability has been replaced by the Condense function (<R).
  • For Hypercomplex 2-, 4-, or 8-dimensional R, Z is the corresponding simple array (INT, FLOAT, RAT, or VFP) with a new coordinate on the right consisting of the coefficients of the Hypercomplex numbers in R, and whose shape is (⍴R),NC. That is, Z contains the coefficients of the Hypercomplex number R. This capability has been replaced by the Dilate function (>R).



For example,

      ⎕←a←⎕DC 4 2⍴1 0 ¯1 0 0 1 0 ¯1
1 ¯1 0i1 0i¯1      ⍝ The four units for Complex numbers
      ⎕DC a
 1  0
¯1  0
 0  1
 0 ¯1

Dyadic Function

Z←L ⎕DC R converts the coefficients of R to the datatype indicated by L.
R is a numeric array.
L is a character scalar or one-element vector datatype ('I', 'F', 'R', or 'V') indicating the datatype to which the coefficients should be converted.
Z is R where all of the coefficients of each of the values are converted to the datatype indicated by L. The shape of Z is the same as that of R.


For example,

      'R' ⎕DC 1.5i3
3r2i3
      'R' ⎕DC 1.1i3
2476979795053773r2251799813685248i3
      'F' ⎕DC 3r2 2476979795053773r2251799813685248
1.5 1.1



Note: ⎕DC is available as both a monadic and dyadic form system function, you cannot assign a value to it.

System Variables (A value may be assigned to these except for ⎕DM)
⎕ALX ⎕CT ⎕DM ⎕DT ⎕ELX ⎕FC ⎕FEATURE ⎕FPC ⎕IC ⎕IO
⎕LR ⎕LX ⎕PP ⎕PR ⎕PW ⎕RL ⎕SA ⎕WSID
Niladic System Functions (a value cannot be assigned to these)
⎕A ⎕AV ⎕EM ⎕ET ⎕LC ⎕NNAMES ⎕NNUMS ⎕SI ⎕SYSID ⎕SYSVER
⎕T ⎕TC ⎕TCBEL ⎕TCBS ⎕TCESC ⎕TCFF ⎕TCHT ⎕TCLF ⎕TCNL ⎕TCNUL
⎕TS ⎕WA
Monadic or dyadic system functions (a value cannot be assigned to these)
⎕AT ⎕CR ⎕DC ⎕DFT ⎕DL ⎕DR ⎕EA ⎕EC ⎕ERROR ⎕ES
⎕EX ⎕FMT ⎕FX ⎕MF ⎕NAPPEND ⎕NC ⎕NCREATE ⎕NERASE ⎕NINFO ⎕NL
⎕NLOCK ⎕NREAD ⎕NRENAME ⎕NREPLACE ⎕NRESIZE ⎕NSIZE ⎕NTIE ⎕NUNTIE ⎕STOP ⎕TF
⎕TRACE ⎕UCS ⎕VR
Note that quad functions and variables (except for the ⎕A family of functions) are case insensitive


See Also
System Commands System Variables and Functions Operators


Keyboard
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Alt ⋄ ¨ ¯ < ≤ ∅ ≥ > ≠ ∨ ∧ × ÷
Shift ~ ! @ # $ % ^ & * ( ) _ +
Key ` 1 2 3 4 5 6 7 8 9 0 - =
Alt+Shift ⍷ √ ⍨ ⍸ ⍥ ⍣ ⍞ ⍬ ⊣
Alt ? ⍵ ∊ ⍴ § ↑ ↓ ⍳ ○ π ← → ⊢
Shift Q W E R T Y U I O P { } |
Key q w e r t y u i o p [ ] \
Alt+Shift ∫ ∂ ⌻ ⍢ ⍙ ⍤ ⍫ ⌷
Alt ⍺ ⌈ ⌊ ∞ ∇ ∆ ∘ ‼ ⎕ ⍎ ⍕
Shift A S D F G H J K L : "
Key a s d f g h j k l ; '
Alt+Shift ⊆ ⊇ χ ⍡ ⍭ ⊙
Alt ⊂ ⊃ ∩ ∪ ⊥ ⊤ ⍦ ⍝ ⍀ ⌿
Shift Z X C V B N M < > ?
Key z x c v b n m , . /
NARS 2000 Lang
Tool
Bar 		← → + - × ÷ * ⍟ ⌹ ○ ! ? √ | ⌈ ⌊ ⊥ ⊤ ⊣ ⊢
≡ ≢ < ≤ = ≥ > ≠ ∨ ∧ ⍱ ⍲ ↑ ↓ ⊂ ⊃ ⌷ ⍋ ⍒
⍳ ∊ ⍸ ⍷ ∪ ∩ ⊆ ⊇ ~ § π .. , ⍪ ⍴ ⌽ ⊖ ⍉
/ \ ⌿ ⍀ ⊙ ¨ ⍨ ⍤ ⍣ ⍡ ⍥ ⍦ . ∘ ⍠ ‼ ⌻ ∂ ∫ ⍞ ⎕ ⍎ ⍕
⋄ ⍝ ∇ ∆ ⍙ _ ⍺ ⍵ ¯ ⍬ ∞ ∅
Second Row i j k i j k l g p r v x
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