How can I find the row differences of a matrix?

Question

How can I compute the row differences of an m x n matrix to obtain an m-1 x n matrix; that is, given

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how do I obtain

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b.gatessucks · Accepted Answer · 2013-01-11 13:00:20Z

up vote 3 down vote accepted

Maybe this ?

m = {{a, b, c}, {d, e, f}, {g, h, i}};
Differences[m] 
(* {{-a + d, -b + e, -c + f}, {-d + g, -e + h, -f + i}} *)

answered Jan 11 at 13:00

b.gatessucks
10.2k2626

Thanks @b.gatesucks I didn't know this function existed! – sebastian c. Jan 11 at 13:06

6

@sebastian if you are grateful for answers you should be Accepting some of them too. You haven't done this for a very long time. Why not? – Mr.Wizard♦ Jan 11 at 13:10

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How can I find the row differences of a matrix?

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