How do i represent a set of clusters points in scatter plot?

dear experiences

i have dataset which has been clusters using k-means and stored in an excel file (clu.xlsx) , my data consist from 200 observations where :

first column is observation labels second column is x data values third columns is y data values fourth columns is cluster ids ( 1,2,3...K "clustering has done using k-means") and : cent= stored the centroids of my clusters

my question :

1. - how do i can plot observation in scatter plot where i would like colored every points in cluster with different colors from other in other clusters.
2. - then how to plot centroids also.

thanks for any suggestion

Answer 1

[Massimo Zanetti]

Hi, what you need is exactly Matlab GSCATTER function. Check out the help page.

[ahmed obaid]

Thanks, suppose 50 points belong to cluster1, 40 points to cluster2, 25 points to cluster3, 80 to cluster4.. so i need to represent all points first along with their centroids, then every cluster points has a certain colors, for example points which belong to cluster 1 has red color, points in cluster2 has blue color and so on.. so is this possible please ?

[Massimo Zanetti]

Yes, it is possible. The help page shows you how to do it. Please read it. Try to modify examples therein to suit your case.

If you find this answer helpful, please accept it.

[ahmed obaid]

thanks, i'm reached to my goal

[Sameema Tariq]

Hey, how did you do that plotting of clusters? Kindly guide me.

Answer 2

[ADRIAN RADILLO]

Hi. How can I use gscatter for 3D scatter plots? I know the function scatter3, but unfortunately the function gscatter3 DOESN'T exist. Could you help me please?