{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-26T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":1973,"title":"Reassign cell contents to empty variables, preserving cell content data type","description":"Given a cell array C, return a cell array D with the following specifications:\r\n\r\n1. D has the same size as the input C.\r\n\r\n2. Each cell of D contains an empty (0x0) variable, the data type of which must match the data type of the original contents of the cell.\r\n\r\nExamples:\r\n\r\n1. If C = {1, 2; zeros(2, 'single'), 'ABC'} then D = { [], []; zeros(0, 'single'), ''}.\r\n\r\n2. If C = {true, rand(2), 'MATLAB'} then D = {true(0), [], ''}.\r\n\r\nNote: cell arrays in the test suite only contain data types present in core MATLAB.","description_html":"\u003cp\u003eGiven a cell array C, return a cell array D with the following specifications:\u003c/p\u003e\u003cp\u003e1. D has the same size as the input C.\u003c/p\u003e\u003cp\u003e2. Each cell of D contains an empty (0x0) variable, the data type of which must match the data type of the original contents of the cell.\u003c/p\u003e\u003cp\u003eExamples:\u003c/p\u003e\u003cp\u003e1. If C = {1, 2; zeros(2, 'single'), 'ABC'} then D = { [], []; zeros(0, 'single'), ''}.\u003c/p\u003e\u003cp\u003e2. If C = {true, rand(2), 'MATLAB'} then D = {true(0), [], ''}.\u003c/p\u003e\u003cp\u003eNote: cell arrays in the test suite only contain data types present in core MATLAB.\u003c/p\u003e","function_template":"function D = resetCell(C)\r\n\r\n\r\nend","test_suite":"%%\r\nC = {1};\r\nD_correct = {[]};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%%\r\nC = {1, 2; zeros(2, 'single'), 'ABC'};\r\nD_correct = { [], []; zeros(0, 'single'), '' };\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%% \r\nC = {true, rand(2), 'MATLAB'};\r\nD_correct = {true(0), [], ''};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%%\r\nC = {1, 2, 'ABC'; true, struct('A', 1), {0}};\r\nD_correct = {[], [], ''; true(0), struct([]), {}};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%% \r\nC = {1, single(3), @sin};\r\nD_correct = {[], single([]), function_handle.empty};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%%\r\nC = {uint8(1), zeros(2, 'int16'), []};\r\nD_correct = {zeros(0, 'uint8'), zeros(0, 'int16'), []};\r\nassert(isequal(resetCell(C), D_correct))","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":2328,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":21,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2013-11-08T21:06:46.000Z","updated_at":"2026-05-27T13:58:01.000Z","published_at":"2013-11-08T21:06:46.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a cell array C, return a cell array D with the following specifications:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1. D has the same size as the input C.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2. Each cell of D contains an empty (0x0) variable, the data type of which must match the data type of the original contents of the cell.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eExamples:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1. If C = {1, 2; zeros(2, 'single'), 'ABC'} then D = { [], []; zeros(0, 'single'), ''}.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2. If C = {true, rand(2), 'MATLAB'} then D = {true(0), [], ''}.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eNote: cell arrays in the test suite only contain data types present in core MATLAB.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"problems":[{"id":1973,"title":"Reassign cell contents to empty variables, preserving cell content data type","description":"Given a cell array C, return a cell array D with the following specifications:\r\n\r\n1. D has the same size as the input C.\r\n\r\n2. Each cell of D contains an empty (0x0) variable, the data type of which must match the data type of the original contents of the cell.\r\n\r\nExamples:\r\n\r\n1. If C = {1, 2; zeros(2, 'single'), 'ABC'} then D = { [], []; zeros(0, 'single'), ''}.\r\n\r\n2. If C = {true, rand(2), 'MATLAB'} then D = {true(0), [], ''}.\r\n\r\nNote: cell arrays in the test suite only contain data types present in core MATLAB.","description_html":"\u003cp\u003eGiven a cell array C, return a cell array D with the following specifications:\u003c/p\u003e\u003cp\u003e1. D has the same size as the input C.\u003c/p\u003e\u003cp\u003e2. Each cell of D contains an empty (0x0) variable, the data type of which must match the data type of the original contents of the cell.\u003c/p\u003e\u003cp\u003eExamples:\u003c/p\u003e\u003cp\u003e1. If C = {1, 2; zeros(2, 'single'), 'ABC'} then D = { [], []; zeros(0, 'single'), ''}.\u003c/p\u003e\u003cp\u003e2. If C = {true, rand(2), 'MATLAB'} then D = {true(0), [], ''}.\u003c/p\u003e\u003cp\u003eNote: cell arrays in the test suite only contain data types present in core MATLAB.\u003c/p\u003e","function_template":"function D = resetCell(C)\r\n\r\n\r\nend","test_suite":"%%\r\nC = {1};\r\nD_correct = {[]};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%%\r\nC = {1, 2; zeros(2, 'single'), 'ABC'};\r\nD_correct = { [], []; zeros(0, 'single'), '' };\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%% \r\nC = {true, rand(2), 'MATLAB'};\r\nD_correct = {true(0), [], ''};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%%\r\nC = {1, 2, 'ABC'; true, struct('A', 1), {0}};\r\nD_correct = {[], [], ''; true(0), struct([]), {}};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%% \r\nC = {1, single(3), @sin};\r\nD_correct = {[], single([]), function_handle.empty};\r\nassert(isequal(resetCell(C), D_correct))\r\n\r\n%%\r\nC = {uint8(1), zeros(2, 'int16'), []};\r\nD_correct = {zeros(0, 'uint8'), zeros(0, 'int16'), []};\r\nassert(isequal(resetCell(C), D_correct))","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":2328,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":21,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2013-11-08T21:06:46.000Z","updated_at":"2026-05-27T13:58:01.000Z","published_at":"2013-11-08T21:06:46.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a cell array C, return a cell array D with the following specifications:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1. D has the same size as the input C.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2. Each cell of D contains an empty (0x0) variable, the data type of which must match the data type of the original contents of the cell.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eExamples:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e1. If C = {1, 2; zeros(2, 'single'), 'ABC'} then D = { [], []; zeros(0, 'single'), ''}.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e2. If C = {true, rand(2), 'MATLAB'} then D = {true(0), [], ''}.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eNote: cell arrays in the test suite only contain data types present in core MATLAB.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"errors":[],"facets":[[],[{"value":"medium","count":1,"selected":false}]],"term":"tag:\"empty arrays\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}