{"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":42593,"title":"Create cell array of numeric arrays","description":"Convert the input to a cell array, but only if necessary.\r\n\r\nIf the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.","description_html":"\u003cp\u003eConvert the input to a cell array, but only if necessary.\u003c/p\u003e\u003cp\u003eIf the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.\u003c/p\u003e","function_template":"function y = cellnum(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = rand;\r\nassert(isequal(cellnum(x),{x}))\r\n\r\n%%\r\nfor ii=1:10\r\n  x = rand(1,randi([2 100]));\r\n  assert(isequal(cellnum(x),{x}))\r\nend\r\n\r\n%%\r\nfor ii=1:10\r\n  x = rand(randi([2 100]),1);\r\n  assert(isequal(cellnum(x),{x}))\r\nend\r\n\r\n%%\r\nfor ii=2:10\r\n  x = magic(ii);\r\n  assert(isequal(cellnum(x),{x}))\r\nend\r\n\r\n%%\r\nfor ii=1:10\r\n  x = num2cell(rand(1,randi(100)));\r\n  assert(isequal(cellnum(x),x))\r\nend\r\n\r\n%%\r\nx = mat2cell(hankel(1:100),[10*ones(1,10)],[10*ones(1,10)]);\r\nassert(isequal(cellnum(x(:)),x(:)))","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":4793,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":46,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-09-09T21:46:25.000Z","updated_at":"2026-05-28T13:57:39.000Z","published_at":"2015-09-09T21:46:25.000Z","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\u003eConvert the input to a cell array, but only if necessary.\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\u003eIf the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.\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":42593,"title":"Create cell array of numeric arrays","description":"Convert the input to a cell array, but only if necessary.\r\n\r\nIf the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.","description_html":"\u003cp\u003eConvert the input to a cell array, but only if necessary.\u003c/p\u003e\u003cp\u003eIf the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.\u003c/p\u003e","function_template":"function y = cellnum(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = rand;\r\nassert(isequal(cellnum(x),{x}))\r\n\r\n%%\r\nfor ii=1:10\r\n  x = rand(1,randi([2 100]));\r\n  assert(isequal(cellnum(x),{x}))\r\nend\r\n\r\n%%\r\nfor ii=1:10\r\n  x = rand(randi([2 100]),1);\r\n  assert(isequal(cellnum(x),{x}))\r\nend\r\n\r\n%%\r\nfor ii=2:10\r\n  x = magic(ii);\r\n  assert(isequal(cellnum(x),{x}))\r\nend\r\n\r\n%%\r\nfor ii=1:10\r\n  x = num2cell(rand(1,randi(100)));\r\n  assert(isequal(cellnum(x),x))\r\nend\r\n\r\n%%\r\nx = mat2cell(hankel(1:100),[10*ones(1,10)],[10*ones(1,10)]);\r\nassert(isequal(cellnum(x(:)),x(:)))","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":4793,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":46,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2015-09-09T21:46:25.000Z","updated_at":"2026-05-28T13:57:39.000Z","published_at":"2015-09-09T21:46:25.000Z","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\u003eConvert the input to a cell array, but only if necessary.\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\u003eIf the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.\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":"easy","count":1,"selected":false}]],"term":"tag:\"mat2cell\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}