function on if and for loops

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ii 2019-11-19

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https://ww2.mathworks.cn/matlabcentral/answers/491840-function-on-if-and-for-loops

编辑： Darshan Sen 2019-11-19

I am trying to run a function where my input variables are x3 and x4. I am trying to run a code for all positive values of x3 AND x4, the function will computes the ratio x1 divided by x2. I have attempted this through if x+2== x1/x2 but keep seeing error so need some help!! THanks

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KALYAN ACHARJYA 2019-11-19

编辑：KALYAN ACHARJYA 2019-11-19

Can you share your efforts here (code)?

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Answer 1

Darshan Sen 2019-11-19

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https://ww2.mathworks.cn/matlabcentral/answers/491840-function-on-if-and-for-loops#answer_402160

编辑：Darshan Sen 2019-11-19

在 MATLAB Online 中打开

Your question doesn't seem very clear to me. x1 and x2 are not clearly defined.

Assuming, you want to define a function that takes in 2 vectors, x3 and x4 and want to return the ratio between only the positive numbers of each vector in another vector, say x, here's the code:

function x = calculate_ratio_of_positive_numbers_plz (x3, x4)
    indices_of_positive_numbers_of_x3_and_x4 = x3 > 0 & x4 > 0;
    values_at_those_indices_of_x3 = x3(indices_of_positive_numbers_of_x3_and_x4);
    values_at_those_indices_of_x4 = x4(indices_of_positive_numbers_of_x3_and_x4);
    x = values_at_those_indices_of_x3 ./ values_at_those_indices_of_x4;
end

Hope this helps. :)