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How to customize the answer of Matlab in advance?

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Pinar
Pinar 2013-8-2
关闭： MATLAB Answer Bot 2021-8-20
Hello,
I have an input matrix like [a b c d e] at the start.
I order these elements in the result according to my codes but I want to predefine the first element of my result. Let's say I obtain a result such as ans = [b e d a c] but I want the first element of this matrix to be d for instance.
What should I write to achieve this kind of a result?
Thank you :)
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Pinar
Pinar 2013-8-2
This is a vehicle routing problem. A vehicle starts from city 2, then stops by city 4, 6, 7, 1, 5, 3 respectively and comes back again to city 2. I want that the vehicle starts its routing from city 1.

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回答（4 个）

Iain
Iain 2013-8-2
Its hard to see what you're trying to achieve, but this MIGHT be what you want to know
> data = [a b c d e];
> order_I_want = [4 3 2 1 5]; %
> data(order_I_want)
ans = [d c b a e]
> output = sort(data)
output = [e b c a d];
> order_I_want = [5 3 2 4 1]; %
> output(order_I_want)
ans = [d c b e a]
  1 个评论
Iain
Iain 2013-8-2
"This is a vehicle routing problem. A vehicle starts from city 2, then stops by city 4, 6, 7, 1, 5, 3 respectively and comes back again to city 2. I want that the vehicle starts its routing from city 1."
data = [2 4 6 7 1 5 3];
data = data([find(data==1):end 1:(find(data==1)-1)])
Azzi Abdelmalek
Azzi Abdelmalek 2013-8-2
编辑：Azzi Abdelmalek 2013-8-2
a_input=[1 2 3 4 5]
a_output=[2 5 4 1 3]
a_output(a_output==4)=[];
a_output=[4 a_output]
Azzi Abdelmalek
Azzi Abdelmalek 2013-8-2
a=[2 ,4, 6, 7, 1, 5, 3 ]
idx=find(a==1)
out=circshift(a, [0 -idx+1])
Andrei Bobrov
Andrei Bobrov 2013-8-2
n = numel(a);
out = a(mod((2:n+1)-find(a == 1),n)+1);

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