Group array elements based upon their differences

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tusu
tusu 2014-9-6
评论： joy 2014-9-6
I have an array
x=[20 18 16 14 11 9 6 3 2 1]
I can find the intermediate difference of the array elements by
x1=-diff(x)
x1=[2 2 2 3 2 3 3 1 1]
Now based upon x1 value, I can group/partition,
x (that array)
in 4 parts where there is a variation of their mutual differences
such that
c1={20,18,16,14}
c2={11}
c3={9,6}
c4={3,2,1}
what shall be my programming logic so that I could partition it 3 or 5 groups as well.
thanks

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