3-D and 4-D Interpolation for datas that are not monotone increasing

Hi,

I have 4 vectors A,B,C and D with n x 1 Dimension , i'th points of the Vectors build workpoint i together. My Problem is that the Datas are not simultaneously monotone increasing, actually the matrice A has the form of : A(1:r,1)=a1, A(r+1:s,1)=a2, A(s+1:t,1)=a3 and A(t+1:n,1)=a4. The matrice B is monotone increasing, The matrices C and D are monotone increasing to a maximal point and decreas afterwards. I wannt to do the 4-D interpolation for C/D ( C/D=f(A,B,D/C) ). I should grid the volume built from A,B and D/C, what I can not do,becaus of the Problom I mentioned above. I was going to use the griddatan function mit the default method of linear interpolation. Does any of U have a solution for this type of datainterpolation?

Dena

Answer 1

[Matt J]

In R2013, there is scatteredInterpolant()

[Dena]

I am using a R2009a at University!

Answer 2

[Sean de Wolski]

Then use griddatan (or encourage your IT department to upgrade the release :) ).

[Dena]

:)) that would be hard, the department is using Win XP ,so... with griddatan the problom remains :(

[Sean de Wolski]

What problem? griddatan existed in 9a.

[Dena]

I have like I said datas that are not simultaneously monotone increasing!

[Sean de Wolski]

This is exactly what griddatan is to be used for!