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Interpolate between two curves [message #75605]

Fri, 25 March 2011 16:40

Gray
Messages: 253
Registered: February 2010

Senior Member

Hi all,

I have a large set (>10,000) of x,y data points, and two non-
overlapping curves (2nd-degree poly fits):
y = a1*x^2+b1*x+c1
y = a2*x^2+b2*x+c2
Curve 1 has z=0 and curve 2 has z=5; z values change linearly in y
between the two curves. How do I find the z values of all my data
points from these curves? I really don't want to loop over all my
points with INTERPOL, but INTERPOLATE can only handle indices, not
data values. Any suggestions? Thanks!

--Gray

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