| MATLAB Function Reference | |
N-dimensional nearest point search
Syntax
Description
k = dsearchn(X,T,XI)
returns the indices k of the closest points in X for each point in XI. X is an m-by-n matrix representing m points in n-dimensional space. XI is a p-by-n matrix, representing p points in n-dimensional space. T is a numt-by-n+1 matrix, a tessellation of the data X generated by delaunayn. The output k is a column vector of length p.
k = dsearchn(X,T,XI,outval)
returns the indices k of the closest points in X for each point in XI, unless a point is outside the convex hull. If XI(J,:) is outside the convex hull, then K(J) is assigned outval, a scalar double. Inf is often used for outval. If outval is [], then k is the same as in the case k = dsearchn(X,T,XI).
k = dsearchn(X,XI)
performs the search without using a tessellation. With large X and small XI, this approach is faster and uses much less memory.
[k,d] = dsearchn(X,...)
also returns the distances d to the closest points. d is a column vector of length p.
See Also
tsearch, dsearch, tsearchn, griddatan, delaunayn
| | dsearch | echo | |
© 1994-2005 The MathWorks, Inc.