Creating a loop for repeated vector values

Question

Topperanium 2024-4-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2111701-creating-a-loop-for-repeated-vector-values

编辑： Voss 2024-4-25

Hi,

I am attempting to setup a massive vector made up of Current values for a battery model. Before this piece of code I have included, the PosAccelReqCurrent already has 15 values. Is it possible to make a loop to repeat the values below for x amount of times rather than just copy and pasting it x times? It would make my code a lot of more efficient rather than having thousands of lines of the same code.

As further context, this code is to create many repeated current cycles to test battery degredation over time. Apologies if I have not added enough explanation.

Thank you.

%%%%%%%%%%%%%%%
maxPARC = length(PosAccelReqCurrent);
for x=1:6500
    PosAccelReqCurrent(maxPARC+x)=PosAccelReqCurrent(15);
end
for x=1:6500
    ActVel(maxPARC+x)=ActVel(15);
end
maxPARC = length(PosAccelReqCurrent);
for x=1:100
    PosAccelReqCurrent(maxPARC+x)=0;
end
for x=1:100
    ActVel(maxPARC+x)=ActVel(15);
end
maxPARC = length(PosAccelReqCurrent);
for x=1:3470
    PosAccelReqCurrent(maxPARC+x)=15;
end
for x=1:3470
    ActVel(maxPARC+x)=0;
end
%%%%%%%%%%%%%%%%%%%%

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Answer 1

Voss 2024-4-25

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2111701-creating-a-loop-for-repeated-vector-values#answer_1447921

编辑：Voss 2024-4-25

在 MATLAB Online 中打开

No loops necessary.

If those are row vectors, then:

newPARCdata = [PosAccelReqCurrent(15)*ones(1,6500) zeros(1,100) 15*ones(1,3470)];
newAVdata = [ActVel(15)*ones(1,6600) zeros(1,3470)];
PosAccelReqCurrent = [PosAccelReqCurrent repmat(newPARCdata,1,x)];
ActVel = [ActVel repmat(newAVdata,1,x)];

If they are column vectors, then:

newPARCdata = [PosAccelReqCurrent(15)*ones(6500,1); zeros(100,1); 15*ones(3470,1)];
newAVdata = [ActVel(15)*ones(6600,1); zeros(3470,1)];
PosAccelReqCurrent = [PosAccelReqCurrent; repmat(newPARCdata,x,1)];
ActVel = [ActVel; repmat(newAVdata,x,1)];

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Voss 2024-4-25

在 MATLAB Online 中打开

Here's a way that works whether they are row or column vectors:

newPARCdata = [PosAccelReqCurrent(15)*ones(1,6500) zeros(1,100) 15*ones(1,3470)];
newAVdata = [ActVel(15)*ones(1,6600) zeros(1,3470)];
PosAccelReqCurrent(end+(1:numel(newPARCdata)*x)) = repmat(newPARCdata,1,x);
ActVel(end+(1:numel(newAVdata)*x)) = repmat(newAVdata,1,x);

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