使用2个索引进行循环

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Morten Jørgensen 2019年3月21日

Commented: Morten Jørgensen on 22 Mar 2019

Accepted Answer: Thorsten

如果要包含另一个索引，我该如何优化此循环

mHome is an 15001x28 array

mBall is an 15001x3 array

                        fori=1:length(mHome)
                       
                        output1(i,1)=pdist([mHome(i,1:2);mBall(i,1:2)]);
                       
                        output1(i,2)=pdist([mHome(i,3:4);mBall(i,1:2)]);
                       
                        output1（i，3）= pdist（[mhome（i，5：6）; mball（i，1：2）]）;
                       
                        output1(i,4)=pdist([mHome(i,7:8);mBall(i,1:2)]);
                       
                        output1（i，5）= pdist（[mhome（i，9：10）; mball（i，1：2）]）;
                       
                        output1(i,6)=pdist([mHome(i,11:12);mBall(i,1:2)]);
                       
                        output1（i，7）= pdist（[mhome（i，13：14）; mball（i，1：2）]）;
                       
                        output1(i,8)=pdist([mHome(i,15:16);mBall(i,1:2)]);
                       
                        output1(i,9)=pdist([mHome(i,17:18);mBall(i,1:2)]);
                       
                        output1(i,10)=pdist([mHome(i,19:20);mBall(i,1:2)]);
                       
                        output1（i，11）= pdist（[mhome（i，21：22）; mball（i，1：2）]）;
                       
                        output1(i,12)=pdist([mHome(i,23:24);mBall(i,1:2)]);
                       
                        output1(i,13)=pdist([mHome(i,25:26);mBall(i,1:2)]);
                       
                        output1(i,14)=pdist([mHome(i,27:28);mBall(i,1:2)]);
                       
                        end
                       
                        % I have tried this but it does not work
                       
                        fori=1:length(mHome)
                       
                        fork = 1：大小（MHOME，2）
                       
                        output1(i,k)=pdist([mHome(i,k);mBall(i,1:2)]);
                       
                        end
                       
                        end

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Morten Jørgensen 2019年3月21日

mBall is a 15001x3 array.

但是我只使用前两个彩色

my output should be a 15001x14 array

Accepted Answer

Thorsten 2019年3月21日

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//www.tianjin-qmedu.com/matlabcentral/answers/451393-using-2-indexs-for-loop#answer_366604

                            fori=1:length(mHome)
                           
                            fork=1:2:size(mHome,2)-1
                           
                            output1(i,k)=pdist([mHome(i,k:k+1);mBall(i,1:2)]);
                           
                            end
                           
                            end

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Morten Jørgensen on 22 Mar 2019

many thanks.

the only problem is that the output is a 15001x27 array and it should be a 15001x27 array.

right now everyother column is a colum with 0

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