finding the closest grid
显示 更早的评论
I have 2 variables and each of 3 discretization say for example, first variable have values (2,4,6) and second variable have (1,3,5). so out of these I can make a 9 combination which looks something like this: grid = {(2,1), (2,3), (2,5), (4,1), (4,3), (4,5), (6,1), (6,3), (6,5)}
Suppose if I have a combination (2.8, 4.2) and I would like to find the closest value out of my 9 combination for it
How can I do that ?
Thanks
采纳的回答
Walter Roberson
2012-2-16
nearestx = interp1([2,4,6], [2,4,6], comb(:,1), 'nearest');
nearesty = interp1([1,3,5], [1,3,5], comb(:,2), 'nearest');
There are other ways as well.
2 个评论
Matt Learner
2012-2-17
Walter Roberson
2012-2-17
The above will handle that situation as well.
var1vals = sort([2, 4, 6, 7, -3, 11, pi^2, sqrt(30)]);
var2vals = sort([1, 3, 5, 9, 1.15, 33, -5, -8]);
nearestx = interp1(var1vals, var1vals, comb(:,1), 'nearest');
nearesty = interp1(var2vals, var2vals, comb(:,2), 'nearest');
An alternative:
var1vals = sort([2, 4, 6, 7, -3, 11, pi^2, sqrt(30)]);
var2vals = sort([1, 3, 5, 9, 1.15, 33, -5, -8]);
[mindiffx, minidxx] = min(bsxfun(@(a,b) abs(a-b), comb(:,1), var1vals), [], 2);
[mindiffy, minidxy] = min(bsxfun(@(a,b) abs(a-b), comb(:,2), var2vals), [], 2);
nearestx = var1vals(minidxx);
nearesty = var2vals(minidxy);
Note that both of these approaches handle all of the combinations at the same time, if the combinations are stored in the matrix "comb" with the first column being the first variable and the second column being the second variable.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Surfaces, Volumes, and Polygons 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
