# Access data from a cell array

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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.

##### 3 Comments

Devanuj Deka
on 15 Jul 2021

### Accepted Answer

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.

### More Answers (1)

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,:))

##### 2 Comments

ANKUR KUMAR
on 14 Jul 2021

Edited: 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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