interpolation using 2D look up table
6 views (last 30 days)
Show older comments
Hello
My Question is
I have matrices A,B gives C. All the matrices are stored in a workspace and has size 81x200.
I would like to interpolate them and store them in a 2D lookup table.
I had used the interp2 function but I am getting errors
could some one clarify this issue?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1610991/image.png)
0 Comments
Accepted Answer
Star Strider
on 7 Feb 2024
See if transposing all of them (use the simple transpose (.')) will work.
To see the difference between meshgrid and ndgrid results —
x = 1:3;
y = 4:6;
[X1,Y1] = meshgrid(x,y)
[X2,Y2] = ndgrid(x,y)
Transposing all of them should put them in ndgrid format.
.
2 Comments
Star Strider
on 7 Feb 2024
You need to have some sort of relation that uses matrices ‘A’ and ‘B’ to produce values of matrix ‘C’ for each element of ‘A’ and ‘B’. After that, given any value within the limits of ‘A’ and ‘B’, you can interpolate to get a new value for ‘C’. You can potentially use any two matrices to interpolate the value of the third matrix, however that likely comes with restrictions, since in that instance there cannot be any repeating values of, and it would be best if was monnotonically increasing or decreasing. It might not be possible to find the ‘A’ and ‘B’ matrices given any specific value of ‘C’ except in some restricted instances. That would certainly not be true generally.
More Answers (0)
See Also
Categories
Find more on Interpolation in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!