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For loop every combination

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gamer
gamer 2021-6-16
编辑： gamer 2021-6-16
Hello community,
I want for loops to check every element from 1 to n with all other elements. so letst say n=4
So I want to check Number 1 with 2,3 and 4// check number 2 with 3 and 4// and check number 3 with 4.
Can I build one or maybe two for loops for something like that?
  2 个评论
Scott MacKenzie
Scott MacKenzie 2021-6-16
Please explain what you mean by "check".
When you say "check Number 1 with 2,3 and 4" what sort of operation or result are you contemplating?
gamer
gamer 2021-6-16
编辑：gamer 2021-6-16
Hey Scott,
so I ve got a matrix v = rand(n,2) and p = rand(n,2) .
for h =1:1000
p = p+v;
But if p(i,:) is in the near of p(j,:), they should switch the value of v. Now I will make an example for row i = 1 and i =4.
if norm(p(1,:)-p(4,:)) <= 2*r
v(1,:) = temp1
v(1,:) = v(4,:)
v(4,:) = temp1
end
end
And I know i want to verify the norm for every rows with all others. And then swaping the v of these rows, if the if statement is true. So I think I have to use two for loops, but I am not sure.

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回答（1 个）

Sulaymon Eshkabilov
Go over this help documentation and will understand how and what to do with [for ... end] loop iteration
https://www.mathworks.com/help/matlab/ref/for.html

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