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
Thanks for clarifying @Rajvi Amle. I have posted an answer with a solution, please check if this is what you wanted.
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.
9 Comments
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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