q=:12
q ITERATE ^: (q>10)^:_ [2
1.0865679
q([`(ITERATE ^:_)@.(10<[))2
1.0865679
q=:5
q ITERATE ^: (q>10)^:_ [2
2
q([`(ITERATE ^:_)@.(10<[))2
5
R.E. Boss
-----Oorspronkelijk bericht-----
Van: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Namens Robert O'Boyle
Verzonden: maandag 22 september 2008 22:29
Aan: [email protected]
Onderwerp: [Jprogramming] Power and selection
I have an application in which I am using the power function to undertake an
iterative solution to an equation but only if one of the inputs is above a
specific value (10).
Here is the verb:
ITERATE =: 4 : 0
s =. p*y
y*x%(+/w*(s%z)*n*1-^-z)
)
p, w, z and n are all fixed outside the function while x and y are of course
the dyadic input.
Now, I want to execute
s =. p * q (ITERATE ^:_) 2
if q is > 10 while I want to execute
p * q otherwise.
I thought of using p * q ITERATE ^: (q>10)^:_ 2 but the problem I am
encountering is that 2, not q, is the result when q <:10. Now if I reverse q
and 2 (and the terms in ITERATE), the function fixes 2 and changes q! I am
obviously missing something in all this. Any help would be appreciated.
Bob
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