can someone check my code?

Question

Safia 2022-9-30

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1815380-can-someone-check-my-code

评论： Walter Roberson 2022-10-1

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Hello!

I have a problem in my code, can anyone help me please?

i have a matrix A(1826*3600) randomly generated contains such values.

i will fill another matrix B based on elements of A, but not all elements(such specific columns)

the first step i did is to generate a vector contains number of specific columns i want to fill.

this is my case :

i created a vector from 1 to 720 element(number of specific columns i want to fill).

S=linspace(1,720,720)

i will check the value in matrix A (in this case for value =50), then i will fill P with my formula.

for i=1:1826
    for j=1:3600
        for k=1:720
            if A(i,j)==50
                P(i,j)=(50*S(k))/3600;
            else P(i,j)=0;
            end
        end
    end
end

this code doesn't work, also i need to elements can't exceed the bounds of my matrix.

i will be grateful if you could help me!

Please HELP!!!!

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Safia 2022-10-1

@David Goodmanson Hi! thank you for your reply! i want to fill 720 columns in matrix B , that's why i put the vector S. i'm trying to find easier solution than fill each column with loop if.

Walter Roberson 2022-10-1

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        for k=1:720
            if A(i,j)==50

Does A(i, j) change inside the for k loop? The next k value, would you not be testing the same A(i, j)? So the end result is going to be the same as it would be if you only did for k=720 and no other iterations.

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Answer 1

Sulaymon Eshkabilov 2022-10-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1815380-can-someone-check-my-code#answer_1064490

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Here is the corrected code:

A=randi([0, 111], 1826, 3600);
S=1:720;
P= zeros(1826, 3600);
for i=1:1826
    for j=1:3600
        for k=1:720
            if A(i,j)==50
                P(i,j)=(50*S(k))/3600;
            end
        end
    end
end