hub toolbox 2.1

OFAI · Oct 14, 2015 · 49755f1 · 49755f1
1 parent 76dcd00
commit 49755f1
Show file tree

Hide file tree

Showing 3 changed files with 11 additions and 2 deletions.
diff --git a/goodman_kruskal.m b/goodman_kruskal.m
@@ -49,7 +49,14 @@
         self_size = length(D_self);
         other_size = length(D_other);
 
-        [tmp, full_idx] = sort(D_full);
+        % Randomize, in case there are equal values
+        % (especially relevant for SNN rescaling)
+        rp = randperm(size(D_full,2));
+        d2 = D_full(rp);
+        [~, d2idx] = sort(d2);
+        full_idx = rp(d2idx);        
+        % OLD code, non-randomized
+        %[tmp, full_idx] = sort(D_full);
 
 
         cc = 0;

diff --git a/hubness.m b/hubness.m
@@ -31,7 +31,7 @@
         d_self = +Inf;
         sortorder = 'ascend';
     end
-
+            
     Dk = zeros(k, size(D, 2));
     for i = 1:size(D, 1)
         % extract distance matrix row

diff --git a/intrinsic_dim.m b/intrinsic_dim.m
@@ -1,4 +1,6 @@
 function no_dims = intrinsic_dim(X)
+% Estimate the intrinsic dimensionality of dataset X (Pts x Dims)
+%
 % Taken from the DR-Toolbox 
 % 
 % This file is part of the Matlab Toolbox for Dimensionality Reduction v0.7.2b.