# Generation of random number which needs to be passed to an array

조회 수: 1(최근 30일)
Ganesh Kini 15 Jun 2020
답변: Rik 15 Jun 2020
I have 2 variables named A and B
A has the range from -0.2 to 2.2
B has the range from -3.2 to 0.2
I need all the possible to combinations of A and B in 0.1 steps
for example
FROM
0.1 0.2
-0.1 -0.3 and so on
How do I randomly generate this?
##### 댓글 수: 2표시숨기기 이전 댓글 수: 1
Ganesh Kini 15 Jun 2020
I want all the sets of randomly mixed values and then I need to iterate them
So, there are two questions
1) How do I randomly pick one set of A and B and then pass it on the array?
2) How do I iterate all the sets of values without using for loop?

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### 답변(1개)

Rik 15 Jun 2020
You can generate all combinations and mix them up like this:
[A,B]=ndgrid(-0.2:0.1:2.2,-3.2:0.1:0.2);
new_order=randperm(numel(A));
A=A(new_order);
B=B(new_order);
Now you can feed it to your next function. Whether you are able to avoid for-loops depends on what function you are trying to call. (and it may not be the optimal strategy to do so at any cost)

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