Calculation with elements in row before or after

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Christian S.
Christian S. 2020-8-24
评论： Bruno Luong 2020-8-24
Hello MATLAB Community,
I'm searching for a elegant way to calculate with matrix-elements in different rows (or columns).
For example:
a= [1 2 3 4 5; 6 7 8 9 0];
b should be a function of a row before, e.g. b=a[Row1] + [Value of Row 2].
The result would also be
b=
7 9 11 13 5
6 7 8 9 0
Or with columns e.g. b=a[Col1] + [Value of Col 2]
b=
3 5 7 9 5
13 15 17 9 0
Does anybody have a hint for me?
Very best
Christian

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采纳的回答

Bruno Luong
Bruno Luong 2020-8-24
编辑：Bruno Luong 2020-8-24
>> a= [1 2 3 4 5; 6 7 8 9 0];
>> a
a =
1 2 3 4 5
6 7 8 9 0
>> conv2(a,[1;1],'same')
ans =
7 9 11 13 5
6 7 8 9 0
>> conv2(a,[1,1],'same')
ans =
3 5 7 9 5
13 15 17 9 0
If you want to do other operation that @plus, use your element-wise function on
a;
arownext = [a(2:end,:); zeros(1,size(a,2))];
a + arownext % replace + with your function
or
a;
acolnext = [a(:,2:end), zeros(size(a,1),1)];
a + acolnext % replace + with your function

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