A man found different pieces of metal. Now he wants to sort
the pieces so that the pieces with the most similar metals
are puting together.

A laboratory analyzes the pieces of metal on different metals.
They found in all pieces the following metals:
- ferium
- titium
- zinc
- nickel.

Now the amount of the metals in the pieces is determined.

          iron   titanium   zinc  nickel
piece 1   1275     875      524   784
piece 2    845     856      546   854
piece 3    875     849      575   524
piece 4   1245     875      568   321
piece 5    758     925      458   754
piece 6    486     985      947   548

The problem is now that he can't see which pieces of metal
have the most similar metals, in this case clusteranalyses
is a good tool to cluster the pieces with the most similar metals
together.