Appending a cell in for loop and accesing

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Chandra Sekhar Kommineni 2022-5-30

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https://ww2.mathworks.cn/matlabcentral/answers/1730175-appending-a-cell-in-for-loop-and-accesing

回答： VINAYAK LUHA 2023-9-7

Hello sir/Madam,

I was trying appending to a cell, Here my data is 1x11 cells. each cell is m*n size.(my data file came from several '.txt' files)

my output of LVcum is different length, I'm getting error because my data file is different length.

for i=1:numel(data)
          clear LDV1_mps
         LV1_mps= table2array(data{1,i}(:,4));
        LVcum{1,i}= cumsum(double(LV1_mps));
end

I'm getting following error,

Unable to perform assignment because the size of the left side is 58569-by-1 and the size of the right side is 56558-by-1.

I know whats problem is, but I'm not sure how to circumvent this? Can someone help me with this?

Thank you in advance,

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Image Analyst 2022-5-30

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Chandra Sekhar Kommineni 2022-5-30

my data file is too big to attach. It was almost 10 MB, coudn't attach and also I can't share that file. Below is sample of my data cell

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Answer 1

VINAYAK LUHA 2023-9-7

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在 MATLAB Online 中打开

Hi Chandra,

To the best of my understanding, you are facing issue while appending matrices of different dimensions to a cell iteratively.

I generated some random data as per the description and ran your code in MATLAB R2023a and the code ran just perfectly.

Mentioned below is the testing code-

x = rand(58569,7);
y = rand(56558,7);
z = rand(58458,7);
data{1,1}= array2table(x);
data{1,2}= array2table(y);
data{1,3}= array2table(z);
for i=1:numel(data)
    clear LDV1_mps
    LV1_mps= table2array(data{1,i}(:,4));
    LVcum{1,i}= cumsum(double(LV1_mps));
end