NARS2000 has no documentation on how to dynamically define a function

Question

I'm frustrated by the lack of clear documentation in NARS2000.

For example, I don't know how to define a function yet. ( I know I can use trains, but that's beside the point. )

  AVG←{(+/⍵)÷⍴⍵} ⍝ computes the average
SYNTAX ERROR
  AVG←{(+/⍵)÷⍴⍵} ⍝ computes the average
                                       ∧

Then,

  AVG←(+/⍵)÷⍴⍵ ⍝ computes the average
VALUE ERROR
  AVG←(+/⍵)÷⍴⍵ ⍝ computes the average
            ∧

At this point, I really starting to wonder if NARS2000 uses ⍵ in function definition.

So how do I do define a function?

Answer 1

Omega ( ⍵ ) is an identifier in NARS2000. You create a function either with the del operator or with the )EDIT command. So if you wanted to define an avg function:

)edit avg

[0] r←avg arg
[1] r←(+/arg)÷⍴arg

Control E to save, then do

   a←5 10 15 20
   avg a

12.5

Answer 2

Good news! As of version 0.4.0.29 (2 Aug 2013) NARS2000 supports Anonymous Functions (a.k.a. dynamic functions). For more details, see the Wiki.

Answer 3

Darn it.

NARS2000 doesn't support dynamic functions.

The feature is on the main page under Wish List of Features.

Answer 4

Actually, there is some implementation of omega/alpha dynamic functions.

Here is an example:

      ⎕SYSVER
0.4.0.29  Fri Aug 02 06:09:58 2013  Win/32

      AVG←{(+/⍵)÷⍴⍵} ⍝ computes the average
      AVG 2 3 5
3.333333333