how to represent 3D points into cluster with the mutual cluster distance over a hard threshold?

i want to implement cluster based image segmentation method,i have a code for it.I want to implement this code in an image.while doing so i have facing the problem of how to represent 3D points into cluster with the mutual cluster distance over a hard threshold? REQUIREMENT: idx=FindPartitions(points,distance) partitions 3-D points into clusters % with the mutual cluster distances over a hard threshold. Can be used to % check point connectivity. % % Parameters: % points can be 3-D or higher dimension, dist is the distance between % clusters, idx is a column vector with the cluster labels.

% Examples: % nPts = 500; % h1 = rand(nPts,1)*10; % r1 = 5+(rand(nPts,1)-.5)*0.5; % degree1 = 160*rand(nPts,1); % % h2 = rand(nPts,1)*10; % r2 = 5+(rand(nPts,1)-.5)*0.5; % degree2 = 160*rand(nPts,1)+180; % % points=[ % r1.*cos(degree1/180*pi),r1.*sin(degree1/180*pi),h1; % r2.*cos(degree2/180*pi),r2.*sin(degree2/180*pi),h2; % ]; % plot3(points(:,1),points(:,2),points(:,3),'.r'); % idx=FindPartitions(points,1.5); % figure,scatter3(points(:,1),points(:,2),points(:,3),ones(2*nPts,1),idx); % code clc;clear all;close all;

I=imread('flower.jpg');

I=(points;dist);

points=((h1,r1):(h2,r2):(h3,r3));

idx=FindPartitions(I);

npoints=500;

h1=rand(npoints,1)*10;

r1=5+(rand(npoints,1)-.5)*0.5;

degree1=160*rand(npoints,1);

h2=rand(npoints,1)*10;

r2=5+(rand(npoints,1)-.5)*0.5;

degree2=160*rand(npoints,1)+180;

points=[ r1.*cos(degree1/180*pi),r1.*sin(degree1/180*pi),h1; r2.*cos(degree2/180*pi),r2.*sin(degree2/180*pi),h2; ];

plot3(points(:,1),points(:,2),points(:,3),'.r');

idx=FindPartitions(points,1.5);

figure,scatter3(points(:,1),points(:,2),points(:,3),ones(2*nPts,1),idx);

error at line points=((h1,r1):(h2,r2):(h3,r3));

error: >> demo Error: File: demo.m Line: 3 Column: 10 Unbalanced or unexpected parenthesis or bracket.

please sugggest me what modification i have to do in code according to requirement?