Reference to non-existent field - DBSCAN

Hi,

I'm trying to import data for DBSCAN clustering but i'm getting "Reference to non-existent field 'X'" error when i chnage the default dataset. I'm using the following code:

%%Load Data
data= load('BCW');
X= data.X;
% data = load('mydata')  ;% default data works perfect
% X = data.X;

%%Run DBSCAN Clustering Algorithm

epsilon=0.5;
MinPts=10;
IDX=DBSCAN(X,epsilon,MinPts);

%%Plot Results

PlotClusterinResult(X, IDX);
title(['DBSCAN Clustering (\epsilon = ' num2str(epsilon) ', MinPts = ' num2str(MinPts) ')']);

Help please?

Answer 1

[Image Analyst]

This is probably a File Exchange submission. Since we don't have that code or BCW.mat file, and it's not a built in Mathworks function, I suggest you contact the author. If he doesn't answer, you'll have to debug it yourself after you read this: http://blogs.mathworks.com/videos/2012/07/03/debugging-in-matlab/ or else attach the BCW.mat file. in the meantime, you can try this:

data = load('BCW')  % DON'T USE A SEMICOLON

and tell us what you see in the command window.

[Thouraya Aouled Messaoud]

Here is the BCW.mat file which i created my own (699x11 double) it contains the wisconsin original breast cancer dataset. The default data mydata.mat is also attached (1000*2 double). I tried as you said but I still get the error.

I will try to contact the author.

[Image Analyst]

OK, I'll do what I asked you to:

s = load('BCW.mat')

s = 
  struct with fields:

      unnamed1: [699×11 double]

So, you see, there is a field named "unnamed1" but there is no field called "X".

[Thouraya Aouled Messaoud]

Yep that was it, Issue resolved.

Thanks a lot ;)