Use for loop to compare each row value out of two separate arrays to create a filtered final array

Question

Austin Bollinger 2022-5-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1722280-use-for-loop-to-compare-each-row-value-out-of-two-separate-arrays-to-create-a-filtered-final-array

编辑： Voss 2022-5-18

I am trying to compare and filter two seperate arrays to make a final filtered array that will display a tilt perception in angles. I am trying to run it through a for loop to compare each row and spit out the final value. I was able to make it work with just two values Pitch 17.99 Roll 9.073 which spits out an angle of 25.88 but I want it to read all the row values in the arrays and give a number. Any help would be appreciated, I am stuck at this moment what to fix.

RollValue = CorrJoystickRoll1(:,1);
PitchValue = CorrJoystickPitch1(:,1);
Angle =[];
for i = 1:length(PitchValue)
    if (RollValue>0)&(PitchValue>0)
        Angle = atand((sind(RollValue))/tand(PitchValue));
    elseif (RollValue>0)&(PitchValue<0)
        Angle = 90 - atand((sind(RollValue))/tand(PitchValue));
    elseif (RollValue<0)&(PitchValue<0)
        Angle = 180 + atand((sind(RollValue))/tand(PitchValue));
    elseif (RollValue<0)&(PitchValue>0)
        Angle = 270 - atand((sind(RollValue))/tand(PitchValue));
    elseif (RollValue>0)&(PitchValue==0)
        Angle = 90;
    elseif (RollValue<0)&(PitchValue==0)
        Angle = 270;
    elseif (RollValue==0)&(PitchValue>0)
        Angle = 0;
    elseif (RollValue==0)&(PitchValue<0)
        Angle = 180;
    end
    Angle;
end 

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Answer 1

Voss 2022-5-18

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1722280-use-for-loop-to-compare-each-row-value-out-of-two-separate-arrays-to-create-a-filtered-final-array#answer_966590

编辑：Voss 2022-5-18

Inside the for loop, use RollValue(i) and PitchValue(i) instead of RollValue and PitchValue, and also you'll need to assign to Angle(i) instead of Angle each time.

However, you can do the same operations more efficiently using logical indexing rather than a for loop:

https://www.mathworks.com/matlabcentral/answers/129-how-does-logical-indexing-work