function?[Dnn_list]?=?compute_nn_distance（Xnbr_nn?options）

%?compute_nn_distance?-?compute?the?distance?to?the?nearest?neighbors
%
%???[Dnn_list]?=?compute_nn_distance（Xnbr_nn?options）;
%
%?X?is?a?（dn）?set?of?n?points?in?R^d
%?nbr_nn?is?the?number?of?nearest?neighbors?to?retrieve
%
%?D?is?a?（nnbr_nn）?matrix?of?distance?D（ij）?is?distance?between?point
%???X（:i）?and?point?X（nn_list（ij）:）
%?nn_list（i:）?is?the?set?of?nearst?neighbors
%
%???options.use_nntools?=?0?force?the?use?of?the?slow?matlab?code
%???????for?nearest?neighbors?computations.
%
%???options.exlude_self?=?1?to?avoid?taking?a?point?it?self?neighbor.
%
%???Copyright?（c）?2006?Gabriel?Peyr?

options.null?=?0;

if?isfield（options?‘use_nntools‘）
????use_nntools?=?options.use_nntools;
else
????use_nntools?=?1;
end
if?isfield（options?‘exlude_self‘）
????exlude_self?=?options.exlude_self;
else
????exlude_self?=?0;
end

if?nargin<2
????nbr_nn?=?size（X2）;
end

if?exlude_self==1
????nbr_nn?=?nbr_nn?+?1;
end

nbr_nn?=?min（nbr_nnsize（X2））;

if?exist（‘nn_prepare‘）>0?&&?use_nntools
????%?use?fast?mex?code
????atria?=?nn_prepare（X‘）;
????[nn_listD]?=?nn_search（X‘?atria?X‘?nbr_nn?0）;
else
????%?use?slow?matlab?code
????D1?=?sqrt（?compute_distance_matrix（X）?）;
????%?find?closest?points
????[Dnn_list]?=?sort（D1）;
????D?=?D（1:nbr_nn:）‘;
????nn_list?=?nn_list（1:nbr_nn:）‘;
end

if?exlude_self==1
	%?remove?self?reference
	nn_list?=?nn_list（:2:end）;
	D?=?D（:2:end）;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1518??2006-09-08?19:11??toolbox_dimreduc\compute_nn_distance.m

?????文件???????1664??2006-09-08?19:14??toolbox_dimreduc\compute_nn_graph.m

?????文件??????57344??2004-05-03?01:01??toolbox_dimreduc\dijkstra_fast.dll

?????文件???????5717??2005-10-10?02:42??toolbox_dimreduc\hlle.m

?????文件???????3950??2006-05-05?18:26??toolbox_dimreduc\isomap.m

?????文件???????7393??2006-09-08?20:53??toolbox_dimreduc\leigs.m

?????文件???????2477??2006-09-08?19:20??toolbox_dimreduc\lle.m

?????文件???????5834??2006-04-10?23:28??toolbox_dimreduc\load_images_dataset.m

?????文件???????4267??2006-02-05?01:40??toolbox_dimreduc\load_points_set.m

?????文件???????1903??2006-08-24?20:50??toolbox_dimreduc\load_subimages_dataset.m

?????文件???????2653??2006-09-08?20:39??toolbox_dimreduc\ltsa.m

?????文件?????120320??2001-01-16?13:09??toolbox_dimreduc\nn_prepare.dll

?????文件???????1645??2002-01-17?13:04??toolbox_dimreduc\nn_prepare.m

?????文件?????128512??2001-01-16?13:09??toolbox_dimreduc\nn_search.dll

?????文件???????1984??2002-01-17?13:04??toolbox_dimreduc\nn_search.m

?????文件???????7182??2006-08-28?02:41??toolbox_dimreduc\pca.m

?????文件???????1523??2006-08-14?00:20??toolbox_dimreduc\perform_dimreduc_interpolation.m

?????文件???????1254??2006-08-13?20:55??toolbox_dimreduc\perform_geodesic_embedding.m

?????文件???????2092??2006-08-28?15:27??toolbox_dimreduc\perform_local_pca.m

?????文件???????1392??2006-08-13?21:54??toolbox_dimreduc\plot_flattened_dataset.m

?????文件?????129024??2001-01-16?13:09??toolbox_dimreduc\range_search.dll

?????文件???????1920??2002-01-17?13:04??toolbox_dimreduc\range_search.m

?????文件???????2505??2006-09-08?21:11??toolbox_dimreduc\readme.txt

?????文件????????793??2006-09-08?21:10??toolbox_dimreduc\test_datasets.m

?????文件???????1464??2006-09-08?21:05??toolbox_dimreduc\test_dimreduc.m

?????文件????????386??2005-10-11?02:26??toolbox_dimreduc\test_display_pointsets.m

?????文件???????1303??2006-09-08?21:07??toolbox_dimreduc\test_images.m

?????文件???????1105??2006-09-08?21:06??toolbox_dimreduc\test_isomap_landmarks.m

?????文件????????876??2006-08-13?21:02??toolbox_dimreduc\test_meshes.m

?????文件????????472??2006-09-08?19:06??toolbox_dimreduc\test_nearest_neighboors.m

............此處省略22個文件信息