How to perform interpolation using inverse of the square of distance
2 views (last 30 days)
Show older comments
Please can someone assist with how to interpolate using the inverse of the square of the distance from points of known values to the point of value you wish to interpolate for?
I am trying to get the pressure at the vertex points of my triangulation by interpolating the pressure at the neighboring control volume midpoints using the inverse of the square of the distance between the center of the neighboring control volume and the vertex.
0 Comments
Answers (1)
Walter Roberson
on 24 Oct 2015
You might want to use something like pdist to get the pairwise distances between your target points and the control points; then square those, take reciprocal, multiply by the pressures at those points (this part is a guess), sum the result.
4 Comments
Walter Roberson
on 24 Oct 2015
But the physical processes involved are scale-invariant, so you should be able to multiply them by an arbitrary scale factor. In particular you should be able to substitute Euclidean distance based upon indices (provided that your x and y scales are the same.)
See Also
Categories
Find more on Interpolation of 2-D Selections in 3-D Grids in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!