Extract data from fileDatastore and cell

Question

M M Nabi 2021-10-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1567438-extract-data-from-filedatastore-and-cell

回答： BhaTTa 2024-7-19

read(fds)

ans =

struct with fields:

data: {178093×3 cell}

Cell data is somthing like that

{1×1×9 double} {10×20×3 single} {[0.4343]}

How can extract all rows and but 1 and 3 number columns such as only {1×1×9 double} {[0.4343]} using fds.data ?

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Answer 1

BhaTTa 2024-7-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/1567438-extract-data-from-filedatastore-and-cell#answer_1487796

To extract specific columns (in your case, columns 1 and 3) from a cell array and obtain all rows, you can use MATLAB's cell array indexing. Given that fds.data is a cell array with dimensions {178093×3}, you can extract the desired columns as follows:

% Extract all rows but only columns 1 and 3

extractedData = fds.data(:, [1, 3]);

% Display the size of the extracted data to confirm

disp(size(extractedData));

% Display the first few rows of the extracted data to verify

disp(extractedData(1:5, :));