Exrapolate values from cell matrix and operations with cell elements

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Hi all
i have a cell matrix where each cell is nx3 double. Assuming you have the coordinates ( [y k] where y and k are arrays )of the cells that interest me, I want, from these selected cells, to extrapolate only the first of the three columns.
How can be done?
Thank you for the help

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Ameer Hamza
Ameer Hamza am 14 Okt. 2020
Bearbeitet: Ameer Hamza am 14 Okt. 2020
I am not sure about the point related to extrapolation. If you just want to extract the first column of selected cells, then you can try this
C; % cell matrix
y; % row index of selected cells
k; % column index of selected cells
idx = sub2idx(size(C), y, k);
C_selected = C(idx);
first_columns = cellfun(@(x) {x(:,1)}, C_selected);
if all columns have same length then you can create a matrix
first_columns = [first_columns{:}];
  4 Kommentare
EldaEbrithil am 15 Okt. 2020
Thanks you very much Ameer!!
I have also another question: consider two array A and B with the same number of cell. Each cell has different length, i want to perform operations with the elements content inside each cell so which of the following expressions is better?
Ameer Hamza
Ameer Hamza am 15 Okt. 2020
It depends on what you are trying to do. / is used for "matrix division", whereas ./ is used for element-wise division. If corresponding cells of A and B have an equal number of elements, then I think you want to use

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