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I have a cell array of 1x10 where each of the 10 arrays are matrices of 138x18. If I want to access the data of each of the cells but just want to calculate the sum of (138,1) and (138,2) from each arrays then how do I calculate and how can I access it?

I tried below to get access through the cell as shown below:

x- 1x10 cell- 138x18 double

X=x{1,10};

m_Au_A1=X(:,1);

m_Au_V1=X(:,2);

I want to calculate the sum of (138,1) and (138,2) from each arrays of cell. How that can be done? Any help would be really appreciated. Thank you in advance.

Devanuj Deka
on 15 Jul 2021

Devanuj Deka
on 15 Jul 2021

Edited: Devanuj Deka
on 15 Jul 2021

@Rajvi Amle, you can try this:

load x % Load the data

Sum = cell(1,10); % Initialize a 1x10 cell array which will store the summed columns from each matrix in 'x'.

for i = 1:10 % For the i'th cell in 'x'

mat = x{i}; % extract the matrix

Sum{i} = mat(:,1) + mat(:,2); % store the sum of the first two columns

end

Here 'Sum' will be a 1x10 cell array, where the i'th cell will store a column vector which is the sum of the first two columns of the matrix in the i'th cell of 'x'. I hope this helps.

ANKUR KUMAR
on 14 Jul 2021

Let us create a random data.

random_data_cell=arrayfun(@(x) rand(138,18), 1:10, 'uni',0);

Let merge these data set in a matrix.

random_data_matrix=cat(3,random_data_cell{:});

size(random_data_matrix)

% "I want to calculate the sum of (138,1) and (138,2) from each arrays of cell."

sum_of_138_1=sum(random_data_matrix(138,1,:))

sum_of_138_2=sum(random_data_matrix(138,2,:))

ANKUR KUMAR
on 14 Jul 2021

If you want to calculate the element wise sum, you can do it using the sum commands.

random_data_cell=arrayfun(@(x) rand(138,18), 1:10, 'uni',0);

random_data_matrix=cat(3,random_data_cell{:});

output=sum(random_data_matrix,3);

output

size(output)

If this is not the expected output, please let us know the dimension of your expected output. What would be the dimension of the output you are expecting?

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