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How using a loop to add up the same numbers in a matrix and store the numbers in a new matrix

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Loo Lee Chong 2022-5-20

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回答： Chandra 2022-5-23

m=[1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9]

for x=1:length(m)

How to compare the data in the matrix and get the same values and add them together then store it in a new matrix.

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the cyclist 2022-5-20

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Do you mean you want to find repeated numbers, and add them?

For

m = [1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9]

would the output be

output = [2,4,6,8,10,12,14,16,18]

?

Can you give another example or two? Try to make the example a representative one.

KSSV 2022-5-20

REad about unique

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Chandra 2022-5-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1723415-how-using-a-loop-to-add-up-the-same-numbers-in-a-matrix-and-store-the-numbers-in-a-new-matrix#answer_969675

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Hi,

Here the code is shown such that the values stored are non repeatednon-repeated and addition of repeated values together

Please find the code below

m=[1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9];
%m = [1 2 4 56 3 35 6 1 2 3 4 2];
m1 = m;
b =0;
for x=1:length(m1)-1
    for j = x+1:length(m1)
        if j>length(m1)
            break
        end
        if m1(x)==m1(j)
            b = b+m(x);
            m1(j) = '';
            if j==x+1
               j= j-1;
            end
        end
    end
    m2(x) = b;
    if x<=length(m1)-1
       b = m1(x+1);
    end
end
m2 = m2(1:length(m1));
m2 %final output values are stored in m2 

Refer to the following documentation for unique values that are not repeated:

https://www.mathworks.com/help/matlab/ref/double.unique.html

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