Error in using pdist2 , error in Exhaustive​Searcher/k​nnsearch

Hello I have a feature vector of 13 dimensions for m samples.I am trying to find the nearest neighbor of the each sample.

[m,~] = size(featurevector);
X = [];
Y = [];
for i = 1: m-1
  if (featurevector(i,14) == 3)
      X = [X;featurevector(i,1:13)];
      Y = [Y;featurevector(i,1:13)];
  end
end

I can get the distances values matrix which gives the distances of all the points when using

 d = pdist2(X,Y,'euclidean');

but i want the indexs which 3 neighbors are near to each data point so i tried

[idx,dist] = knnsearch(X,Y,'k',3,'distance','euclidean');

but it shows an error

 Error using pdist2
       Too many input arguments.
 Error in ExhaustiveSearcher/knnsearch (line 207)
       [dist,idx] = pdist2(obj.X,Y, distMetric, arg{:}, 'smallest',numNN);
 Error in knnsearch (line 144)
    [idx, dist] = knnsearch(O,Y,'k',numNN, 'includeties',includeTies);

I expect the result to be an array showing the nearest neighbor for each point in the featurevector. Can any one suggest where I went wrong ?

[Walter Roberson]

Please show the output of

which -all pdist2

The source for pdist2 that I am looking at in R2016a cannot produce the "Too many input arguments" message.

[Raady]

c:\toolbox\classify\pdist2.m C:\Program Files (x86)\MATLAB\MATLAB Production Server\R2015a\toolbox\stats\stats\pdist2.m % Shadowed

[Raady]

I am using Matlab 2015a

Answer 1

[Walter Roberson]

Your third party file c:\toolbox\classify\pdist2.m is interfering with use of the pdist2 from the Statistics toolbox. You need to rename or delete c:\toolbox\classify\pdist2.m or remove that directory from your MATLAB path.

[Raady]

I used Matlab2007a before, I guessed the uninstallation would have remove all of those. Thank you so much it worked !