Extracting and sorting data in a column

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Olu B
Olu B 2019-8-8
编辑： madhan ravi 2019-8-8
Hi For example I have a 19 x1 colunmn called Mx and I need to find the maximum value in every 2 rows till the end of the column.
Mx
20
22
23
21
34
54
23
14
67
56
34
32
21
12
43
23
56
34
32
  2 个评论
Alex Mcaulley
Alex Mcaulley 2019-8-8
Can you show the expected result in your example?
Olu B
Olu B 2019-8-8
The expected result would be
NewMx = [22 23 54 23 67 34 21 43 56 32]
Cheers

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回答（2 个）

madhan ravi
madhan ravi 2019-8-8
编辑：madhan ravi 2019-8-8
Works for odd as well as even number of elements:
NewMx = max(reshape([Mx(:);...
-Inf(mod(numel(Mx),2))],2,[])) % thank you Guillaume
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Jos (10584)
Jos (10584) 2019-8-8
This works for both an even or an odd number of elements:
N = 11 ; % odd
Mx = randi(10, N, 1)
M2 = accumarray(ceil((1:numel(Mx))/2).', Mx, [], @max)

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