How to enter your data in cluster analysis?

load fisheriris
[cidx2,cmeans2] = kmeans(meas,2,'dist','sqeuclidean');
[silh2,h] = silhouette(meas,cidx2,'sqeuclidean');

Hello! In the examples of cluster analysis, there is one such one, but how can I indicate my values ​​in it (I have a 2x10000 matrix) ?