max value of N arrays

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simone zappalà
simone zappalà 2022-5-25
回答： Voss 2022-5-25
I've several arrays, all are 130 rows and 1 column with different numbers created from a for cycle, so every row is the result of a for cycle i=1:130. I want to know how i can take the max value between these arrays for every cycle. At the end i need an array with 130 rows and one column each row is the max value between all the arrays.
example
x=[1,3,6,9]
y=[2,4,5,8]
max(x,y)=[2,4,6,9]

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Voss
Voss 2022-5-25
Ran in:
You say they're column vectors in the description, but the example uses row vectors. It doesn't really matter, you can do it either way:
x=[1,3,6,9]; % row vectors given
y=[2,4,5,8];
z=[0,5,1,2];
max([x;y;z],[],1) % row vector result
ans = 1×4
2 5 6 9
x=[1;3;6;9]; % column vectors given
y=[2;4;5;8];
z=[0;5;1;2];
max([x y z],[],2) % column vector result
ans = 4×1
2 5 6 9

更多回答（1 个）

MJFcoNaN
MJFcoNaN 2022-5-25
Ran in:
You can concatenate all the vectors and use function of max by the given dimension. For example
x=[1,3,6,9].';
y=[2,4,5,8].';
A=[x, y]
A = 4×2
1 2 3 4 6 5 9 8
m=max(A, [], 2)
m = 4×1
2 4 6 9

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