On Nov 18, 2007, at 8:08 PM, molistok wrote:
Thank you very much for the replys, now I can put the function acos
and run.
I put one example:
(bind ?a (call java.lang.Math acos (/ (- (- (** ?d1 2) (** ?d2 2))
(** ?d3
2)) (* (* -2 ?d3) ?d2))))
thank you very much.
Why can't put acos without call java.lang.Math?Thanks.
Simply because there's no function by that name built into Jess. One
of the appendices of the Jess manual lists all the available Jess
functions.
You could define your own "acos" like this:
(deffunction acos (?arg)
(call java.lang.Math acos ?arg))
And then you could call this like
(acos 0.45)
Ernest Friedman-Hill wrote:
It just means what it sounds like: some code in this example called a
function named "Acos", but there's no function by that name to call.
Jess doesn't have one built in, and the example apparently doesn't
define one, either.
On Nov 18, 2007, at 3:41 PM, molistok wrote:
Hi, I am trying to run one example of jess and I see this error:
while executing (Acos ?valor)
...
...
unimplemented function Acos.
Can anybody help me please?
Thanks.
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