# Thread: spline cube interpolation anyone kows??

1. ## spline cube interpolation anyone knows??

Dear All,

I have a Mid term on Saturday moring and need help I'm stuck on these two problems . I cant understand it and cant find the equation to make it work

it is problem 3 and 4. I have attached the problem sheet,

[IMG]file:///C:/Users/dromar/AppData/Local/Temp/msohtmlclip1/01/clip_image002.png[/IMG]
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2. ## Re: spline cube interpolation anyone kows??

Hey Paragandhi.

Hint - Try stating the interpolation condition in terms of the derivatives.

3. ## Re: spline cube interpolation anyone kows??

thanks for responding chico. I'm very confused on this. Could you get me started on both these problems. your help is highly appreciated

4. ## Re: spline cube interpolation anyone kows??

If it interpolates points it crosses through them.

Splines usually have some kind of continuity constraints which means derivatives are involved but for the moment let's put that aside.

You need to solve for the coefficients of your spline by knowing that it goes through the following points - which means substituting x and y and then getting a system of equations for coefficients and solving.

See if you can get the system of coefficients first.