Math probelm (KOS related.)

[glen.mack]

I'm writing a program for a specific ship, where I'll be calculating a specific speed on the fly.

Over the course of about 30 seconds, I want my angle of ascent to smoothly change from 90 to Whatever angle brings me to and then maintains that speed.

I tried programming in a sigmoid curve...

FUNCTION SIG
{
PARAMETER v.
PARAMETER t.
SET v TO 1/(1+((constant:E)^(t))).
RETURN v.
}

No dice. The function either returns a null object or too many parameter calls. (no matter how many I input.)

Is there another option to calculate this on the fly? (without vecdraws, it's too complicated for me.)

[Dunbaratu]

What's the design rationale for passing in v as a parameter when it never gets read by the function and it just calculates it anew? Why not just pass in t alone, calculate a local v, and return the v ?

FUNCTION SIG
{
  PARAMETER t.
  LOCAL v IS 1/(1+((constant:E)^(t))).
  RETURN v.
}

or even just eliminate the local altogether since it only lives long enough to be returned:

FUNCTION SIG
{
  PARAMETER t.
  RETURN 1/(1+((constant:E)^(t))).
}

 

[glen.mack]

5 hours ago, Steven Mading said:

What's the design rationale for passing in v as a parameter when it never gets read by the function and it just calculates it anew? Why not just pass in t alone, calculate a local v, and return the v ?

FUNCTION SIG
{
  PARAMETER t.
  LOCAL v IS 1/(1+((constant:E)^(t))).
  RETURN v.
}

or even just eliminate the local altogether since it only lives long enough to be returned:

FUNCTION SIG
{
  PARAMETER t.
  RETURN 1/(1+((constant:E)^(t))).
}

 

It was just my attempt at getting the equation to work when t alone was throwing errors. (new to programming.)

 Both your format and mine return the plus of the equation as an object reference not set to an instance. For which I have no explanation.

[Dunbaratu]

Can you show me the actual error message?  Mine works just fine when I run it.

 

[glen.mack]

27 minutes ago, Steven Mading said:

Can you show me the actual error message?  Mine works just fine when I run it.

 

Not sure what I fiddled with to get the object error message... Back to too many arguments...