CSPLINE and iteration

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I am looking at some programme which will involve curve fitting (possibly). I had a look at the doc and it seems quite straigforward but I am not getting what I expect when attempting a plot of the cspline. The overall problem is explained in the attached mcad (can't copy and-paste)

Thanks

Regards

JXB

1_csplineornot-xmcd.zip

Statistics_Analysis

Werner_E

25-Diamond I

The attached file should help with cspline and linterp

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1_csplineornot_2-xmcdz.zip

J

JBlackhole

Author

16-Pearl

thanks Werner. Make sense now!

How does one interpolate between 2 sets of known data then? For example (see also attached) if one has data for a ratio b/d=0.1 and b/d=0.2 but one wants a Y value (K on the mcad sheet) for say b/d=0.164? Should one construct a "dummy" curve (spline) between thw 2 sets of data

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Werner_E

25-Diamond I

J B wrote:
thanks Werner. Make sense now!
How does one interpolate between 2 sets of known data then? For example (see also attached) if one has data for a ratio b/d=0.1 and b/d=0.2 but one wants a Y value (K on the mcad sheet) for say b/d=0.164? Should one construct a "dummy" curve (spline) between thw 2 sets of data

basically - yes. You are asking for a 2-dimensional interplolation. Guess the attached sheet should help.

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1_2D_3D-Iinterpolation-xmcdz.zip

J

JBlackhole

Author

16-Pearl

file attached

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1_csplineornot_3-xmcd.zip