How to calculate value using different matrix using if and for loop

Question

Adhish Aggarwal 2017-4-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/336188-how-to-calculate-value-using-different-matrix-using-if-and-for-loop

评论： Adhish Aggarwal 2017-4-19

I want to calculate the value of up5 and down5 with the given condition. Each cell of up5 or down5 should be calculated separately by following the condition. But it shows only one type either std5*2 + avg5 or std5*3 + avg5 and not the combined answer.

b =  AXIS(1:100,1) - KOTAK(1:100,1);
avg5 = zeros(5,1);
for k = 5:length(b)
    avg5(k) = mean(b(k-4:k,1));
end
a = 0;
avg5 = [a;avg5];
avg5(numel(avg5),:) = [];
std5 = zeros(5,1);
for al = 5:length(b)
    std5(al) = std(b(al-4:al,1));
end
% a = 0;
std5 = [a;std5];
std5(numel(std5),:) = [];
up5 = zeros(length(std5),1);
for d = 1 : length(std5)
    if abs(b) < 14.5
       up5(d) =  std5*2 + avg5;
     down5(d) = std5*(-2) + avg5;
    else
       up5(d) =  std5*2 + avg5;
     down5(d) = std5*(-2) + avg5;
    end
end

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Answer 1

Andrew Newell 2017-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/336188-how-to-calculate-value-using-different-matrix-using-if-and-for-loop#answer_263673

在 MATLAB Online 中打开

In the line

if abs(b) < 14.5

the condition is looking at the entire 100 x 1 vector b, and the condition is only true if all the entries are less than 14.5. There is no dependence on d. Perhaps you want this?

if abs(b(d)) < 14.5