How can I exclude outliers from a k-mean cluster?

I have number of smaller data sets, containing 10 points each, I am using R2012a and k-means to obtain a centroid. In some of the clusters I can see some extreme points, beacuse my dataset are as small as they are, one outliner destroys the value of my centroid. Is there a way to exlude these points? Supposingly Matlab has a 'exclude outliers' function but I can't see it anywhere in the tool menu.. Thank you for your help! (and yes I am new to this:-)

Answer 1

[Image Analyst]

Do you mean Brett Shoelson's deleteoutliers?

http://www.mathworks.com/matlabcentral/fileexchange/3961