SW curve calculator

[Bill Ballard]

At 7:55 PM -0400 8/27/03, Mark Davidson wrote:
>The nice thing is you only have to enter 4 values, for notes 1, 30, 59 and 88.
>  It calculates a smooth curve (Bezier curve) for the rest.

Very nice, Mark. For about ten years now, I've been using a charting 
app (http://www.redrocksw.com/deltagraph/), which offers statistical 
curve fitting for the data points. The curve I've used has been a 
polynomial one (up to ten degrees, for increasingly local ripples in 
the general curve), although, like yours, it is drawn as a Bezier 
curve.

It's roundabout, though. I have to create the curve fit on the data 
set, then copy the curve's formula, edit it, and paste it as the 
function creating a new data set (the y-values where the x-values hit 
the curve). I'd always dreamed it was possible to do this in Excel, 
but didn't have the math to do it.

My hat's off to you.

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

"Talking about music is like dancing about architecture"
     ...........Steve Martin
+++++++++++++++++++++