SW curve calculator

[Bill Ballard]

At 7:38 PM -0400 8/28/03, Mark Davidson wrote:
>3. If you want to smooth SWs but not put them on a standard curve, you can
>enter them (as in the example SW values I gave) and then adjust your curve to
>smooth them out.

I'm a little confused here. The "standard curve" you refer to, would 
an example of that be one of Stanwood's standard curves?

What do you mean by "adjust your curve to smooth them out"? The only 
way to adjust the curve (ie., alter it) is to change the goal points, 
right? This is a visual process where one looks at the raw, jagged 
data set and decides intuitively what values #1, 30, 59 and 88 would 
need to either smooth that jagged line, or further 2.) insure that 
the smoothed value was never 1.0g less than the original raw value. 
(Let's be reasonable about how much one can carve off a hammer.) Once 
the goal points are set, the curve they yield has to be smooth. Or is 
what you're talking about smoothing is the original jagged data set?

>Note that for "curvier" curves, the note 30 and 59 goals
>may not match the result curve.  Endpoints will always be
>exact matches.

You're correct. However, these must be different Bezier curves than 
the ones I'm familiar with from the vector-based draw programs like 
Adobe Illustrator and MacroMedia Freehand. Your "goal points" appear 
to be their anchor points. The definition of their Bezier curve is 
that it will pass through the anchor points. Also, regardless of the 
approach which the curve on either side of the anchor point makes, 
when each side hits the anchor point, their inclination (slope) is 
identical.

What, pray tell do you have hidden in cells J2 through J5?  <g> 
(Gawd, I hate MS Excel. Why can't they manage to include the standard 
file command "Revert to Saved"?)

Bill Ballard RPT
NH Chapter, P.T.G.

"I go, two plus like, three is pretty much totally five. Whatever"
     ...........The new math
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