How can I make matrix choose?

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Mahmoud Sami
Mahmoud Sami 2018-10-21
评论： Mahmoud Sami 2018-10-21

I had a function get me variable m like that

  • m=[60;90;90;180;125.3;90;60;45;135]
  • and I need N to change when m changes.
  • When m=0 or 180 N=0
  • When m=90 N=1
  • when m=45 or 135 N=0.5
  • Otherwise P =5.
  • N and P are matrices not just value because it will be used in other equations.

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madhan ravi
madhan ravi 2018-10-21
编辑：madhan ravi 2018-10-21
>> m=[60;90;90;180;125.3;90;60;45;135]
N=zeros(1,numel(m)); % your N should be here instead of this
N(m==0 | m==180)=0;
N(m==90)=1;
N(m==45 | m==135)=0.5;
N = N'
m =
60.0000
90.0000
90.0000
180.0000
125.3000
90.0000
60.0000
45.0000
135.0000
N =
0
1.0000
1.0000
0
0
1.0000
0
0.5000
0.5000
>>
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madhan ravi
madhan ravi 2018-10-21
its ok it happens you will improve sooner :) , explain with steps what you are trying to achieve lets debug together
Mahmoud Sami
Mahmoud Sami 2018-10-21
My master is to get optimization for cost in a piping design system. The cost of piping depends on piping weight. So the piping lenght,diameter and other components is the major items L, OD, N. So I need to know the shortest path, then optimize the diameter and calculate the cost. N is no of elbows in system the degree of elbows affects cost as it affect industry. So need to change the angle between segments to 90 or 45 and minimize no. Of elbows also. The penalty fcn for genetic algorithms is to put penalty to cost if ang is not 90 or 45. To make the optimization not choose it. That's in simple way.

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