lousy at math

Command: (load "phi")
; error: LOAD failed: "phi"

Command: phi
1.61803

Command:
Command: '_.help
Command: (* phi 2)
; error: bad argument type: numberp: nil

Command: (* (phi) 2)
; error: no function definition: PHI

Command: phi
1.61803

Command:
Command: PHI 1.61803

Command:


my acaddoc.lsp has this in it..... (defun chi () (/ (+ 1 (sqrt 5)) 2))

am scratching head as to why i cant times it by two.. or three, or ....
which part of code did i write wrong? did it on fly. seems to me, that i should simply be able to
:: (* phi 2) (times phi by two)

oh well.

 

I think the problem is that you haven't set a variable to hold the real
number. The function returns the value, but only when you run it, and I
don't think you can run it when it's a term in another function. Try running
this:

(defun chunction ( / ) (setq phi (/ (+ 1 (sqrt 5)) 2)))

Now you can summon the vaule stored in phi from other functions during the
drawing session. I also think it's a problem to have the function and the
variable have the same name. If you want to use the value of phi in other
functions, name this function something else.

 

(defun chi () (setq phi (/ (+ 1 (sqrt 5)) 2)))
The function name won't interfere with the variable name, so if
sunnysidedown wants to have a "phi" function and variable, it'll be
OK.

 

That's what I thought, but it didn't work until I changed it...That's why I
said "I think".
--


MichaelB
www.michaelbulatovich.ca

(defun chi () (setq phi (/ (+ 1 (sqrt 5)) 2)))
The function name won't interfere with the variable name, so if
sunnysidedown wants to have a "phi" function and variable, it'll be
OK.

 

Not being critical, just factual. You would be correct in assuming
there would be interference IF the function name did not have "c:" in
front of it.

Bill DeShawn
http://my.sterling.net/~bdeshawn

 

Have you tried it named the same?\

Not being critical, just factual. You would be correct in assuming
there would be interference IF the function name did not have "c:" in
front of it.

Bill DeShawn
http://my.sterling.net/~bdeshawn