{"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":1835,"title":"Matrix to column conversion","description":"Given a matrix of any size, convert it into a column vector.\r\ne.g A=[10 20 30;\r\n       40 50 60]\r\nthen,\r\nB = [10;\r\n    40;\r\n    20;\r\n    50;\r\n    30;\r\n    60;]","description_html":"\u003cp\u003eGiven a matrix of any size, convert it into a column vector.\r\ne.g A=[10 20 30;\r\n       40 50 60]\r\nthen,\r\nB = [10;\r\n    40;\r\n    20;\r\n    50;\r\n    30;\r\n    60;]\u003c/p\u003e","function_template":"function y = Mat2Vector(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = [10 20 30;40 50 60];\r\ny_correct = [10; 40;20; 50; 30; 60;]\r\nassert(isequal(Mat2Vector(x),y_correct))\r\n\r\n%%\r\nx=[-2 -4 -6; -1 -3 -5; -10 -20 0]\r\ny_correct = [-2; -1;-10; -4; -3;-20; -6;-5;0]\r\nassert(isequal(Mat2Vector(x),y_correct))\r\n\r\n%%\r\nx=[1 2 3 4 5; 6 7 8 9 10];\r\nx(:,:,2) = [10 20 30 40 50;60 70 80 90 100];\r\ny_correct = [1;6;2;7;3;8;4;9;5;10;10;60;20;70;30;80;40;90;50;100]\r\nassert(isequal(Mat2Vector(x),y_correct))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":16381,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":373,"test_suite_updated_at":"2013-08-18T20:55:54.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2013-08-18T20:39:50.000Z","updated_at":"2026-04-20T21:21:14.000Z","published_at":"2013-08-18T20:40:16.000Z","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 matrix of any size, convert it into a column vector. e.g A=[10 20 30; 40 50 60] then, B = [10; 40; 20; 50; 30; 60;]\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":1835,"title":"Matrix to column conversion","description":"Given a matrix of any size, convert it into a column vector.\r\ne.g A=[10 20 30;\r\n       40 50 60]\r\nthen,\r\nB = [10;\r\n    40;\r\n    20;\r\n    50;\r\n    30;\r\n    60;]","description_html":"\u003cp\u003eGiven a matrix of any size, convert it into a column vector.\r\ne.g A=[10 20 30;\r\n       40 50 60]\r\nthen,\r\nB = [10;\r\n    40;\r\n    20;\r\n    50;\r\n    30;\r\n    60;]\u003c/p\u003e","function_template":"function y = Mat2Vector(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = [10 20 30;40 50 60];\r\ny_correct = [10; 40;20; 50; 30; 60;]\r\nassert(isequal(Mat2Vector(x),y_correct))\r\n\r\n%%\r\nx=[-2 -4 -6; -1 -3 -5; -10 -20 0]\r\ny_correct = [-2; -1;-10; -4; -3;-20; -6;-5;0]\r\nassert(isequal(Mat2Vector(x),y_correct))\r\n\r\n%%\r\nx=[1 2 3 4 5; 6 7 8 9 10];\r\nx(:,:,2) = [10 20 30 40 50;60 70 80 90 100];\r\ny_correct = [1;6;2;7;3;8;4;9;5;10;10;60;20;70;30;80;40;90;50;100]\r\nassert(isequal(Mat2Vector(x),y_correct))\r\n","published":true,"deleted":false,"likes_count":1,"comments_count":0,"created_by":16381,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":373,"test_suite_updated_at":"2013-08-18T20:55:54.000Z","rescore_all_solutions":false,"group_id":1,"created_at":"2013-08-18T20:39:50.000Z","updated_at":"2026-04-20T21:21:14.000Z","published_at":"2013-08-18T20:40:16.000Z","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 matrix of any size, convert it into a column vector. e.g A=[10 20 30; 40 50 60] then, B = [10; 40; 20; 50; 30; 60;]\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:\"column vector\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}