Clustered 3D scatterplot with kmeans

hi,

I have a set of xyz,

and i want to plot the scatterplot of 3D data with clustering and then i want to find the mean of each clustered data by k-means

I wrote the code below but it is not working. it is for 150 cluster. What will be the problem. I think the problem is about "scatter3(xyz(:,1),xyz(:,2),xyz(:,3), idx,'bgm')"

Thank you

x=xlsread('kesit3D.xlsx', 'A:A');

y=xlsread('kesit3D.xlsx', 'B:B');

z=xlsread('kesit3D.xlsx', 'C:C');

xyz=[x y z];

[idx,C] = kmeans(xyz,150);

figure

scatter3(xyz(:,1),xyz(:,2),xyz(:,3), idx,'bgm')

hold on

plot(C(:,1),C(:,2),C(:,3),'kx')

disp(C)