custom distance with the kmeans

hi ,

i wanna use this equation to comput distance detween each data and two centroid ( let data (x1,x2) and first centroid (c1,c2) and second centroid (c3,c4)

abs((x1-c1)/std(x1))+abs((x2-c2)/std(x1)) this between the data and first centroid

abs((x1-c3)/std(x2))+abs((x2-c4)/std(x2)) this between the data and second centroid

then choice the shortest ( this in kmeans function )

thanks

Answer 1

[David Hill]

data=randi(100,10,2);
centroid1=randi(100,1,2);
centroid2=randi(100,1,2);
m=sum(abs((data-centroid1)./std(data(:,1))),2);
n=sum(abs((data-centroid2)./std(data(:,2))),2);
km=min(m,n)

km = 10×1

0.5618 2.5094 0.7151 0.1873 1.0936 2.3971 2.4720 1.6854 1.5731 1.2619

[majeed]

thanks alot but , i wanna use kmeans with my equation ( briefly use (manhattan /std ) in comput distance in kmeans

[David Hill]

I am not sure what you want. Are you having problems using kmeans? Have you looked at the matlab documentation kmeans?

[majeed]

i wanna use kmeans but use special equation to comput distance