"How to get the standard deviation from clustered data?"

Hi,

after clustering my data, the data has the following format:

id A B C Cluster
a x y z  0
.. .... .... 1
.. .... .... 1
.. .... .... 2
.. .... .... 0
.. .... ....
.. .... .... N

So the cluster algorithm found several clusters and created a new column with the attribute cluster. I now want to calculate the standard deviation for Cluster 0 for the attributes A B and C, the same for cluster 1 up to N. Any ideas how this works?

cordially,
Stever