Error using ==> plus Matrix dimensions must agree.
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load irisdataset.txt DataSet=irisdataset;
Dim=size(DataSet);
%----------------------- Selecting 3 random centres ----------------------% Selection=rand(1,3); Selection=Selection*Dim(1,1); Selection=ceil(Selection); %Selecting the row number.
%--------------------------- 3 random centres ----------------------------% Centre1=DataSet(Selection(1),:); Centre2=DataSet(Selection(2),:); Centre3=DataSet(Selection(3),:);
n=input('No Of Iterations : ') %----------------------- Partitional Algorithm ---------------------------% %-------------------------- K means Algorithm ----------------------------% for j=1:1:n count1=0; Mean1=zeros(1,4); count2=0; group1=[]; Mean2=zeros(1,4); group2=[]; count3=0; group3=[]; Mean3=zeros(1,4);
%Finding the minimum distance for i=1:1:Dim(1,1)
Pattern1(i)=sqrt((Centre1(1,1)-DataSet(i,1))^2+(Centre1(1,2)-DataSet(i,2))^2+(Centre1(1,3)-DataSet(i,3))^2+(Centre1(1,4)-DataSet(i,4))^2); Pattern2(i)=sqrt((Centre2(1,1)-DataSet(i,1))^2+(Centre2(1,2)-DataSet(i,2))^2+(Centre2(1,3)-DataSet(i,3))^2+(Centre1(1,4)-DataSet(i,4))^2); Pattern3(i)=sqrt((Centre3(1,1)-DataSet(i,1))^2+(Centre3(1,2)-DataSet(i,2))^2+(Centre3(1,3)-DataSet(i,3))^2+(Centre1(1,4)-DataSet(i,4))^2);
LessDist=[Pattern1(i) Pattern2(i) Pattern3(i)]; Minimum=min(LessDist);
%Finding the new centre if (Minimum==Pattern1(i)) count1=count1+1; Mean1=Mean1+DataSet(i,:); group1=[group1 i]; else if (Minimum==Pattern2(i)) count2=count2+1; Mean2=Mean2+DataSet(i,:); group2=[group2 i]; else count3=count3+1; Mean3=Mean3+DataSet(i,:); group3=[group3 i]; end end
end
%----------------------------- New Centres -------------------------------% Centre1=Mean1/count1; Centre2=Mean2/count2; Centre3=Mean3/count3; plot(j,count1,'r'); hold on plot(j,count2,'g'); plot(j,count3,'b');
end
hold off % specify the indexed color for each point icolor = ceil((DataSet(:,4)/max(DataSet(:,4)))*256);
figure, scatter3(DataSet(:,1),DataSet(:,2),DataSet(:,3),DataSet(:,4),icolor,'filled'); figure,
scatter3(DataSet(:,1),DataSet(:,2),DataSet(:,3),[],DataSet(:,4),'filled')
1 Comment
Jan
on 19 Sep 2013
Edited: Jan
on 19 Sep 2013
Please format your code properly when you want encourage others to read it. Follow the "? Help" link to learn more about formatting in this forum.
Posting the complete error message is a good method to allow the readers to recognize which line causes the problem. We cannot guess such details, but we cannot run you code also due to the missing input file.
Answers (1)
Jan
on 19 Sep 2013
The debugger is the right tool to solve such problems:
dbstop if error
The start your function again. When it stops check the dimensions of the local variables e.g. by typing "size(...)" in the command window.
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