System Function DC

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 1-measureable R (that is, simple numeric, e.g. BOOL, INT, APA, FLOAT, RAT, or VFP) where the number of columns of R (call that NC) is 1, 2, 4, or 8, Z is the corresponding Hypercomplex array whose measure 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.
For 2-, 4-, or 8-measurable R, Z is the corresponding simple array (INT, FLOAT, RAT, or VFP) with a new dimension 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.

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

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 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