How Do I To Store First Value To Satisfy Condition In A For Loop?

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Matome Moremi 2018-3-31

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关闭： MATLAB Answer Bot 2021-8-20

I have a code that has to calculate the amount of ballast needed to be added to move the center of mass to the center geometry and where it should be added(Its position)

I made a for loop with the added mass as the index. This gives multiple Positions but i need to get the FIRST to satisfy my required conditions

My code is as follows...

I want the first Positive Pos_add that is Less or equal to DesiredCoM. Instead of all the Pos_adds that meet this condition...(which it gives me)

for M_add=1:0.01:Mass;
Pos_add=(-sum(Masses.*Positions)+(DesiredCoM)*(Mass+M_add))/M_add
if Pos_add>0 & Pos_add<=DesiredCoM
break
end
endfor

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Answer 1

William Smith 2018-4-3

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https://ww2.mathworks.cn/matlabcentral/answers/391898-how-do-i-to-store-first-value-to-satisfy-condition-in-a-for-loop#answer_313319

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    % Find the position of the first element that matches.
    pos = find(Pos_add > 0 && Pos_add <= DesiredCoM, 1, 'first');
    % Get the value
    answer = Pos_add(pos);